Code
P1633
BMW
P — Powertrain
Throttle Valve Adaptation Limp Home Position
Views:
UK: 20
EN: 38
RU: 27
AI status
Completed
Completed
100%
Causes
- Throttle body mechanical binding or carbon buildup preventing proper movement
- Faulty throttle body (actuator motor or position sensor)
- Faulty accelerator pedal position sensor(s) or poor correlation with throttle position
- Damaged wiring or poor connectors to throttle actuator or sensors
- Low or unstable battery/charging system voltage during adaptation
- Lost or corrupted adaptation data after battery disconnect or module replacement
Symptoms
- Malfunction Indicator Lamp (MIL) on
- Reduced engine power / limp-home mode with limited throttle response
- Fixed or reduced maximum engine speed and poor acceleration
- Inconsistent or delayed throttle response
- Stored throttle-related fault codes and inability to perform relearn
What to check
- Read and record freeze-frame data and all stored/related DTCs with BMW-compatible scan tool
- Verify battery voltage and charging system (must be stable during adaptation)
- Visually inspect throttle body connector and wiring for corrosion, damage, or loose pins
- Compare accelerator pedal sensor outputs vs throttle actual position using live data
- Attempt throttle adaptation/relearn using factory tool (ISTA/D) and capture error messages
- Inspect throttle body for carbon/deposits or mechanical obstruction
Signal parameters
- Accelerator pedal position sensor 1 (voltage or %): at rest ~0–5% (or ~0.5–1.0 V depending on vehicle)
- Accelerator pedal position sensor 2 (redundant): should closely match sensor 1
- Throttle command (target angle / %): follows pedal input command from DME
- Throttle actual (measured) angle / %: should track target within a few degrees or percent
- Throttle actuator motor current/effort: shows activity when adaptation commanded
- Battery voltage: should be >12.2 V during adaptation and charging >13.5 V with engine running
Diagnostic algorithm
- Connect a BMW-capable scanner, read all DTCs and freeze frame. Note any related pedal or throttle codes (e.g., P2135, P2101).
- Verify battery/resting/charging voltage. Charge or replace weak battery and ensure stable voltage before further tests.
- Visually inspect throttle body connector and wiring for damage, corrosion or poor pins; repair as needed.
- With ignition on (engine off), monitor pedal sensor 1 & 2 and throttle actual vs target. Confirm pedal sensors correlate and throttle moves when commanded by scan tool.
- Attempt a throttle valve adaptation/relearn procedure using factory diagnostic tool (follow tool prompts). Record any errors returned by the tool.
- If adaptation fails, remove and inspect throttle body for carbon or mechanical binding; clean if appropriate then retry adaptation.
- If cleaning/adaptation do not resolve, bench-test or replace the throttle body assembly (including internal sensors/actuator). After replacement, perform adaptation and clear codes.
- If throttle body and wiring check good but adaptation still fails, check DME for software updates, map faults, or perform DME diagnostics; consider ECU repair/reflash per manufacturer guidance.
- After repair and successful adaptation, clear codes and perform road test to confirm normal throttle response and that code does not return.
Likely causes
- Throttle body failing (stuck or motor not responding)
- Bad throttle position sensor (internal to throttle body)
- Incorrect pedal-to-throttle correlation (pedal sensor fault or wiring)
- Battery voltage drop during adaptation or weak battery
- Connector corrosion or harness damage at throttle body
- Adaptation not performed after throttle service or battery replacement
Fault status
Status
Throttle valve adaptation failed — system in limp-home. Check throttle body, pedal sensors, wiring and battery. Perform adaptation/relearn with BMW diagnostic tool.
Repair difficulty: Medium
Diagnostic time: 0.5-3 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P1633
BUICK
P — Powertrain
Ignition Supply Power Circuit Low Voltage
Views:
UK: 17
EN: 39
RU: 23
AI status
Completed
Completed
100%
Causes
- Throttle body mechanical binding or carbon buildup preventing proper movement
- Faulty throttle body (actuator motor or position sensor)
- Faulty accelerator pedal position sensor(s) or poor correlation with throttle position
- Damaged wiring or poor connectors to throttle actuator or sensors
- Low or unstable battery/charging system voltage during adaptation
- Lost or corrupted adaptation data after battery disconnect or module replacement
Symptoms
- Malfunction Indicator Lamp (MIL) on
- Reduced engine power / limp-home mode with limited throttle response
- Fixed or reduced maximum engine speed and poor acceleration
- Inconsistent or delayed throttle response
- Stored throttle-related fault codes and inability to perform relearn
What to check
- Read and record freeze-frame data and all stored/related DTCs with BMW-compatible scan tool
- Verify battery voltage and charging system (must be stable during adaptation)
- Visually inspect throttle body connector and wiring for corrosion, damage, or loose pins
- Compare accelerator pedal sensor outputs vs throttle actual position using live data
- Attempt throttle adaptation/relearn using factory tool (ISTA/D) and capture error messages
- Inspect throttle body for carbon/deposits or mechanical obstruction
Signal parameters
- Accelerator pedal position sensor 1 (voltage or %): at rest ~0–5% (or ~0.5–1.0 V depending on vehicle)
- Accelerator pedal position sensor 2 (redundant): should closely match sensor 1
- Throttle command (target angle / %): follows pedal input command from DME
- Throttle actual (measured) angle / %: should track target within a few degrees or percent
- Throttle actuator motor current/effort: shows activity when adaptation commanded
- Battery voltage: should be >12.2 V during adaptation and charging >13.5 V with engine running
Diagnostic algorithm
- Connect a BMW-capable scanner, read all DTCs and freeze frame. Note any related pedal or throttle codes (e.g., P2135, P2101).
- Verify battery/resting/charging voltage. Charge or replace weak battery and ensure stable voltage before further tests.
- Visually inspect throttle body connector and wiring for damage, corrosion or poor pins; repair as needed.
- With ignition on (engine off), monitor pedal sensor 1 & 2 and throttle actual vs target. Confirm pedal sensors correlate and throttle moves when commanded by scan tool.
- Attempt a throttle valve adaptation/relearn procedure using factory diagnostic tool (follow tool prompts). Record any errors returned by the tool.
- If adaptation fails, remove and inspect throttle body for carbon or mechanical binding; clean if appropriate then retry adaptation.
- If cleaning/adaptation do not resolve, bench-test or replace the throttle body assembly (including internal sensors/actuator). After replacement, perform adaptation and clear codes.
- If throttle body and wiring check good but adaptation still fails, check DME for software updates, map faults, or perform DME diagnostics; consider ECU repair/reflash per manufacturer guidance.
- After repair and successful adaptation, clear codes and perform road test to confirm normal throttle response and that code does not return.
Likely causes
- Throttle body failing (stuck or motor not responding)
- Bad throttle position sensor (internal to throttle body)
- Incorrect pedal-to-throttle correlation (pedal sensor fault or wiring)
- Battery voltage drop during adaptation or weak battery
- Connector corrosion or harness damage at throttle body
- Adaptation not performed after throttle service or battery replacement
Fault status
Status
Throttle valve adaptation failed — system in limp-home. Check throttle body, pedal sensors, wiring and battery. Perform adaptation/relearn with BMW diagnostic tool.
Repair difficulty: Medium
Diagnostic time: 0.5-3 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P1633
CADILLAC
P — Powertrain
Ignition Supply Power Circuit Low Voltage
Views:
UK: 24
EN: 40
RU: 28
AI status
Completed
Completed
100%
Causes
- Throttle body mechanical binding or carbon buildup preventing proper movement
- Faulty throttle body (actuator motor or position sensor)
- Faulty accelerator pedal position sensor(s) or poor correlation with throttle position
- Damaged wiring or poor connectors to throttle actuator or sensors
- Low or unstable battery/charging system voltage during adaptation
- Lost or corrupted adaptation data after battery disconnect or module replacement
Symptoms
- Malfunction Indicator Lamp (MIL) on
- Reduced engine power / limp-home mode with limited throttle response
- Fixed or reduced maximum engine speed and poor acceleration
- Inconsistent or delayed throttle response
- Stored throttle-related fault codes and inability to perform relearn
What to check
- Read and record freeze-frame data and all stored/related DTCs with BMW-compatible scan tool
- Verify battery voltage and charging system (must be stable during adaptation)
- Visually inspect throttle body connector and wiring for corrosion, damage, or loose pins
- Compare accelerator pedal sensor outputs vs throttle actual position using live data
- Attempt throttle adaptation/relearn using factory tool (ISTA/D) and capture error messages
- Inspect throttle body for carbon/deposits or mechanical obstruction
Signal parameters
- Accelerator pedal position sensor 1 (voltage or %): at rest ~0–5% (or ~0.5–1.0 V depending on vehicle)
- Accelerator pedal position sensor 2 (redundant): should closely match sensor 1
- Throttle command (target angle / %): follows pedal input command from DME
- Throttle actual (measured) angle / %: should track target within a few degrees or percent
- Throttle actuator motor current/effort: shows activity when adaptation commanded
- Battery voltage: should be >12.2 V during adaptation and charging >13.5 V with engine running
Diagnostic algorithm
- Connect a BMW-capable scanner, read all DTCs and freeze frame. Note any related pedal or throttle codes (e.g., P2135, P2101).
- Verify battery/resting/charging voltage. Charge or replace weak battery and ensure stable voltage before further tests.
- Visually inspect throttle body connector and wiring for damage, corrosion or poor pins; repair as needed.
- With ignition on (engine off), monitor pedal sensor 1 & 2 and throttle actual vs target. Confirm pedal sensors correlate and throttle moves when commanded by scan tool.
- Attempt a throttle valve adaptation/relearn procedure using factory diagnostic tool (follow tool prompts). Record any errors returned by the tool.
- If adaptation fails, remove and inspect throttle body for carbon or mechanical binding; clean if appropriate then retry adaptation.
- If cleaning/adaptation do not resolve, bench-test or replace the throttle body assembly (including internal sensors/actuator). After replacement, perform adaptation and clear codes.
- If throttle body and wiring check good but adaptation still fails, check DME for software updates, map faults, or perform DME diagnostics; consider ECU repair/reflash per manufacturer guidance.
- After repair and successful adaptation, clear codes and perform road test to confirm normal throttle response and that code does not return.
Likely causes
- Throttle body failing (stuck or motor not responding)
- Bad throttle position sensor (internal to throttle body)
- Incorrect pedal-to-throttle correlation (pedal sensor fault or wiring)
- Battery voltage drop during adaptation or weak battery
- Connector corrosion or harness damage at throttle body
- Adaptation not performed after throttle service or battery replacement
Fault status
Status
Throttle valve adaptation failed — system in limp-home. Check throttle body, pedal sensors, wiring and battery. Perform adaptation/relearn with BMW diagnostic tool.
Repair difficulty: Medium
Diagnostic time: 0.5-3 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P1633
CHEVROLET
P — Powertrain
Ignition Supply Power Circuit Low Voltage
Views:
UK: 23
EN: 45
RU: 27
AI status
Completed
Completed
100%
Causes
- Throttle body mechanical binding or carbon buildup preventing proper movement
- Faulty throttle body (actuator motor or position sensor)
- Faulty accelerator pedal position sensor(s) or poor correlation with throttle position
- Damaged wiring or poor connectors to throttle actuator or sensors
- Low or unstable battery/charging system voltage during adaptation
- Lost or corrupted adaptation data after battery disconnect or module replacement
Symptoms
- Malfunction Indicator Lamp (MIL) on
- Reduced engine power / limp-home mode with limited throttle response
- Fixed or reduced maximum engine speed and poor acceleration
- Inconsistent or delayed throttle response
- Stored throttle-related fault codes and inability to perform relearn
What to check
- Read and record freeze-frame data and all stored/related DTCs with BMW-compatible scan tool
- Verify battery voltage and charging system (must be stable during adaptation)
- Visually inspect throttle body connector and wiring for corrosion, damage, or loose pins
- Compare accelerator pedal sensor outputs vs throttle actual position using live data
- Attempt throttle adaptation/relearn using factory tool (ISTA/D) and capture error messages
- Inspect throttle body for carbon/deposits or mechanical obstruction
Signal parameters
- Accelerator pedal position sensor 1 (voltage or %): at rest ~0–5% (or ~0.5–1.0 V depending on vehicle)
- Accelerator pedal position sensor 2 (redundant): should closely match sensor 1
- Throttle command (target angle / %): follows pedal input command from DME
- Throttle actual (measured) angle / %: should track target within a few degrees or percent
- Throttle actuator motor current/effort: shows activity when adaptation commanded
- Battery voltage: should be >12.2 V during adaptation and charging >13.5 V with engine running
Diagnostic algorithm
- Connect a BMW-capable scanner, read all DTCs and freeze frame. Note any related pedal or throttle codes (e.g., P2135, P2101).
- Verify battery/resting/charging voltage. Charge or replace weak battery and ensure stable voltage before further tests.
- Visually inspect throttle body connector and wiring for damage, corrosion or poor pins; repair as needed.
- With ignition on (engine off), monitor pedal sensor 1 & 2 and throttle actual vs target. Confirm pedal sensors correlate and throttle moves when commanded by scan tool.
- Attempt a throttle valve adaptation/relearn procedure using factory diagnostic tool (follow tool prompts). Record any errors returned by the tool.
- If adaptation fails, remove and inspect throttle body for carbon or mechanical binding; clean if appropriate then retry adaptation.
- If cleaning/adaptation do not resolve, bench-test or replace the throttle body assembly (including internal sensors/actuator). After replacement, perform adaptation and clear codes.
- If throttle body and wiring check good but adaptation still fails, check DME for software updates, map faults, or perform DME diagnostics; consider ECU repair/reflash per manufacturer guidance.
- After repair and successful adaptation, clear codes and perform road test to confirm normal throttle response and that code does not return.
Likely causes
- Throttle body failing (stuck or motor not responding)
- Bad throttle position sensor (internal to throttle body)
- Incorrect pedal-to-throttle correlation (pedal sensor fault or wiring)
- Battery voltage drop during adaptation or weak battery
- Connector corrosion or harness damage at throttle body
- Adaptation not performed after throttle service or battery replacement
Fault status
Status
Throttle valve adaptation failed — system in limp-home. Check throttle body, pedal sensors, wiring and battery. Perform adaptation/relearn with BMW diagnostic tool.
Repair difficulty: Medium
Diagnostic time: 0.5-3 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P1633
CITROEN
P — Powertrain
Ignition-on ECU supply control short circuit to earth or open circuit
Views:
UK: 2
EN: 10
RU: 6
AI status
Completed
Completed
100%
Causes
- Throttle body mechanical binding or carbon buildup preventing proper movement
- Faulty throttle body (actuator motor or position sensor)
- Faulty accelerator pedal position sensor(s) or poor correlation with throttle position
- Damaged wiring or poor connectors to throttle actuator or sensors
- Low or unstable battery/charging system voltage during adaptation
- Lost or corrupted adaptation data after battery disconnect or module replacement
Symptoms
- Malfunction Indicator Lamp (MIL) on
- Reduced engine power / limp-home mode with limited throttle response
- Fixed or reduced maximum engine speed and poor acceleration
- Inconsistent or delayed throttle response
- Stored throttle-related fault codes and inability to perform relearn
What to check
- Read and record freeze-frame data and all stored/related DTCs with BMW-compatible scan tool
- Verify battery voltage and charging system (must be stable during adaptation)
- Visually inspect throttle body connector and wiring for corrosion, damage, or loose pins
- Compare accelerator pedal sensor outputs vs throttle actual position using live data
- Attempt throttle adaptation/relearn using factory tool (ISTA/D) and capture error messages
- Inspect throttle body for carbon/deposits or mechanical obstruction
Signal parameters
- Accelerator pedal position sensor 1 (voltage or %): at rest ~0–5% (or ~0.5–1.0 V depending on vehicle)
- Accelerator pedal position sensor 2 (redundant): should closely match sensor 1
- Throttle command (target angle / %): follows pedal input command from DME
- Throttle actual (measured) angle / %: should track target within a few degrees or percent
- Throttle actuator motor current/effort: shows activity when adaptation commanded
- Battery voltage: should be >12.2 V during adaptation and charging >13.5 V with engine running
Diagnostic algorithm
- Connect a BMW-capable scanner, read all DTCs and freeze frame. Note any related pedal or throttle codes (e.g., P2135, P2101).
- Verify battery/resting/charging voltage. Charge or replace weak battery and ensure stable voltage before further tests.
- Visually inspect throttle body connector and wiring for damage, corrosion or poor pins; repair as needed.
- With ignition on (engine off), monitor pedal sensor 1 & 2 and throttle actual vs target. Confirm pedal sensors correlate and throttle moves when commanded by scan tool.
- Attempt a throttle valve adaptation/relearn procedure using factory diagnostic tool (follow tool prompts). Record any errors returned by the tool.
- If adaptation fails, remove and inspect throttle body for carbon or mechanical binding; clean if appropriate then retry adaptation.
- If cleaning/adaptation do not resolve, bench-test or replace the throttle body assembly (including internal sensors/actuator). After replacement, perform adaptation and clear codes.
- If throttle body and wiring check good but adaptation still fails, check DME for software updates, map faults, or perform DME diagnostics; consider ECU repair/reflash per manufacturer guidance.
- After repair and successful adaptation, clear codes and perform road test to confirm normal throttle response and that code does not return.
Likely causes
- Throttle body failing (stuck or motor not responding)
- Bad throttle position sensor (internal to throttle body)
- Incorrect pedal-to-throttle correlation (pedal sensor fault or wiring)
- Battery voltage drop during adaptation or weak battery
- Connector corrosion or harness damage at throttle body
- Adaptation not performed after throttle service or battery replacement
Fault status
Status
Throttle valve adaptation failed — system in limp-home. Check throttle body, pedal sensors, wiring and battery. Perform adaptation/relearn with BMW diagnostic tool.
Repair difficulty: Medium
Diagnostic time: 0.5-3 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P1633
DAEWOO
P — Powertrain
Immo. lamp fault
Views:
UK: 2
EN: 11
RU: 6
AI status
Completed
Completed
100%
Causes
- Throttle body mechanical binding or carbon buildup preventing proper movement
- Faulty throttle body (actuator motor or position sensor)
- Faulty accelerator pedal position sensor(s) or poor correlation with throttle position
- Damaged wiring or poor connectors to throttle actuator or sensors
- Low or unstable battery/charging system voltage during adaptation
- Lost or corrupted adaptation data after battery disconnect or module replacement
Symptoms
- Malfunction Indicator Lamp (MIL) on
- Reduced engine power / limp-home mode with limited throttle response
- Fixed or reduced maximum engine speed and poor acceleration
- Inconsistent or delayed throttle response
- Stored throttle-related fault codes and inability to perform relearn
What to check
- Read and record freeze-frame data and all stored/related DTCs with BMW-compatible scan tool
- Verify battery voltage and charging system (must be stable during adaptation)
- Visually inspect throttle body connector and wiring for corrosion, damage, or loose pins
- Compare accelerator pedal sensor outputs vs throttle actual position using live data
- Attempt throttle adaptation/relearn using factory tool (ISTA/D) and capture error messages
- Inspect throttle body for carbon/deposits or mechanical obstruction
Signal parameters
- Accelerator pedal position sensor 1 (voltage or %): at rest ~0–5% (or ~0.5–1.0 V depending on vehicle)
- Accelerator pedal position sensor 2 (redundant): should closely match sensor 1
- Throttle command (target angle / %): follows pedal input command from DME
- Throttle actual (measured) angle / %: should track target within a few degrees or percent
- Throttle actuator motor current/effort: shows activity when adaptation commanded
- Battery voltage: should be >12.2 V during adaptation and charging >13.5 V with engine running
Diagnostic algorithm
- Connect a BMW-capable scanner, read all DTCs and freeze frame. Note any related pedal or throttle codes (e.g., P2135, P2101).
- Verify battery/resting/charging voltage. Charge or replace weak battery and ensure stable voltage before further tests.
- Visually inspect throttle body connector and wiring for damage, corrosion or poor pins; repair as needed.
- With ignition on (engine off), monitor pedal sensor 1 & 2 and throttle actual vs target. Confirm pedal sensors correlate and throttle moves when commanded by scan tool.
- Attempt a throttle valve adaptation/relearn procedure using factory diagnostic tool (follow tool prompts). Record any errors returned by the tool.
- If adaptation fails, remove and inspect throttle body for carbon or mechanical binding; clean if appropriate then retry adaptation.
- If cleaning/adaptation do not resolve, bench-test or replace the throttle body assembly (including internal sensors/actuator). After replacement, perform adaptation and clear codes.
- If throttle body and wiring check good but adaptation still fails, check DME for software updates, map faults, or perform DME diagnostics; consider ECU repair/reflash per manufacturer guidance.
- After repair and successful adaptation, clear codes and perform road test to confirm normal throttle response and that code does not return.
Likely causes
- Throttle body failing (stuck or motor not responding)
- Bad throttle position sensor (internal to throttle body)
- Incorrect pedal-to-throttle correlation (pedal sensor fault or wiring)
- Battery voltage drop during adaptation or weak battery
- Connector corrosion or harness damage at throttle body
- Adaptation not performed after throttle service or battery replacement
Fault status
Status
Throttle valve adaptation failed — system in limp-home. Check throttle body, pedal sensors, wiring and battery. Perform adaptation/relearn with BMW diagnostic tool.
Repair difficulty: Medium
Diagnostic time: 0.5-3 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P1633
DAIHATSU
P — Powertrain
ECU emergency home circuit abnormal
Views:
UK: 2
EN: 10
RU: 4
AI status
Completed
Completed
100%
Causes
- Throttle body mechanical binding or carbon buildup preventing proper movement
- Faulty throttle body (actuator motor or position sensor)
- Faulty accelerator pedal position sensor(s) or poor correlation with throttle position
- Damaged wiring or poor connectors to throttle actuator or sensors
- Low or unstable battery/charging system voltage during adaptation
- Lost or corrupted adaptation data after battery disconnect or module replacement
Symptoms
- Malfunction Indicator Lamp (MIL) on
- Reduced engine power / limp-home mode with limited throttle response
- Fixed or reduced maximum engine speed and poor acceleration
- Inconsistent or delayed throttle response
- Stored throttle-related fault codes and inability to perform relearn
What to check
- Read and record freeze-frame data and all stored/related DTCs with BMW-compatible scan tool
- Verify battery voltage and charging system (must be stable during adaptation)
- Visually inspect throttle body connector and wiring for corrosion, damage, or loose pins
- Compare accelerator pedal sensor outputs vs throttle actual position using live data
- Attempt throttle adaptation/relearn using factory tool (ISTA/D) and capture error messages
- Inspect throttle body for carbon/deposits or mechanical obstruction
Signal parameters
- Accelerator pedal position sensor 1 (voltage or %): at rest ~0–5% (or ~0.5–1.0 V depending on vehicle)
- Accelerator pedal position sensor 2 (redundant): should closely match sensor 1
- Throttle command (target angle / %): follows pedal input command from DME
- Throttle actual (measured) angle / %: should track target within a few degrees or percent
- Throttle actuator motor current/effort: shows activity when adaptation commanded
- Battery voltage: should be >12.2 V during adaptation and charging >13.5 V with engine running
Diagnostic algorithm
- Connect a BMW-capable scanner, read all DTCs and freeze frame. Note any related pedal or throttle codes (e.g., P2135, P2101).
- Verify battery/resting/charging voltage. Charge or replace weak battery and ensure stable voltage before further tests.
- Visually inspect throttle body connector and wiring for damage, corrosion or poor pins; repair as needed.
- With ignition on (engine off), monitor pedal sensor 1 & 2 and throttle actual vs target. Confirm pedal sensors correlate and throttle moves when commanded by scan tool.
- Attempt a throttle valve adaptation/relearn procedure using factory diagnostic tool (follow tool prompts). Record any errors returned by the tool.
- If adaptation fails, remove and inspect throttle body for carbon or mechanical binding; clean if appropriate then retry adaptation.
- If cleaning/adaptation do not resolve, bench-test or replace the throttle body assembly (including internal sensors/actuator). After replacement, perform adaptation and clear codes.
- If throttle body and wiring check good but adaptation still fails, check DME for software updates, map faults, or perform DME diagnostics; consider ECU repair/reflash per manufacturer guidance.
- After repair and successful adaptation, clear codes and perform road test to confirm normal throttle response and that code does not return.
Likely causes
- Throttle body failing (stuck or motor not responding)
- Bad throttle position sensor (internal to throttle body)
- Incorrect pedal-to-throttle correlation (pedal sensor fault or wiring)
- Battery voltage drop during adaptation or weak battery
- Connector corrosion or harness damage at throttle body
- Adaptation not performed after throttle service or battery replacement
Fault status
Status
Throttle valve adaptation failed — system in limp-home. Check throttle body, pedal sensors, wiring and battery. Perform adaptation/relearn with BMW diagnostic tool.
Repair difficulty: Medium
Diagnostic time: 0.5-3 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P1633
DS
P — Powertrain
Ignition-on ECU supply control short circuit to earth or open circuit
Views:
UK: 2
EN: 11
RU: 6
AI status
Completed
Completed
100%
Causes
- Throttle body mechanical binding or carbon buildup preventing proper movement
- Faulty throttle body (actuator motor or position sensor)
- Faulty accelerator pedal position sensor(s) or poor correlation with throttle position
- Damaged wiring or poor connectors to throttle actuator or sensors
- Low or unstable battery/charging system voltage during adaptation
- Lost or corrupted adaptation data after battery disconnect or module replacement
Symptoms
- Malfunction Indicator Lamp (MIL) on
- Reduced engine power / limp-home mode with limited throttle response
- Fixed or reduced maximum engine speed and poor acceleration
- Inconsistent or delayed throttle response
- Stored throttle-related fault codes and inability to perform relearn
What to check
- Read and record freeze-frame data and all stored/related DTCs with BMW-compatible scan tool
- Verify battery voltage and charging system (must be stable during adaptation)
- Visually inspect throttle body connector and wiring for corrosion, damage, or loose pins
- Compare accelerator pedal sensor outputs vs throttle actual position using live data
- Attempt throttle adaptation/relearn using factory tool (ISTA/D) and capture error messages
- Inspect throttle body for carbon/deposits or mechanical obstruction
Signal parameters
- Accelerator pedal position sensor 1 (voltage or %): at rest ~0–5% (or ~0.5–1.0 V depending on vehicle)
- Accelerator pedal position sensor 2 (redundant): should closely match sensor 1
- Throttle command (target angle / %): follows pedal input command from DME
- Throttle actual (measured) angle / %: should track target within a few degrees or percent
- Throttle actuator motor current/effort: shows activity when adaptation commanded
- Battery voltage: should be >12.2 V during adaptation and charging >13.5 V with engine running
Diagnostic algorithm
- Connect a BMW-capable scanner, read all DTCs and freeze frame. Note any related pedal or throttle codes (e.g., P2135, P2101).
- Verify battery/resting/charging voltage. Charge or replace weak battery and ensure stable voltage before further tests.
- Visually inspect throttle body connector and wiring for damage, corrosion or poor pins; repair as needed.
- With ignition on (engine off), monitor pedal sensor 1 & 2 and throttle actual vs target. Confirm pedal sensors correlate and throttle moves when commanded by scan tool.
- Attempt a throttle valve adaptation/relearn procedure using factory diagnostic tool (follow tool prompts). Record any errors returned by the tool.
- If adaptation fails, remove and inspect throttle body for carbon or mechanical binding; clean if appropriate then retry adaptation.
- If cleaning/adaptation do not resolve, bench-test or replace the throttle body assembly (including internal sensors/actuator). After replacement, perform adaptation and clear codes.
- If throttle body and wiring check good but adaptation still fails, check DME for software updates, map faults, or perform DME diagnostics; consider ECU repair/reflash per manufacturer guidance.
- After repair and successful adaptation, clear codes and perform road test to confirm normal throttle response and that code does not return.
Likely causes
- Throttle body failing (stuck or motor not responding)
- Bad throttle position sensor (internal to throttle body)
- Incorrect pedal-to-throttle correlation (pedal sensor fault or wiring)
- Battery voltage drop during adaptation or weak battery
- Connector corrosion or harness damage at throttle body
- Adaptation not performed after throttle service or battery replacement
Fault status
Status
Throttle valve adaptation failed — system in limp-home. Check throttle body, pedal sensors, wiring and battery. Perform adaptation/relearn with BMW diagnostic tool.
Repair difficulty: Medium
Diagnostic time: 0.5-3 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P1633
GM
P — Powertrain
Ignition Supply Power Circuit Low Voltage
Views:
UK: 20
EN: 52
RU: 28
AI status
Completed
Completed
100%
Causes
- Throttle body mechanical binding or carbon buildup preventing proper movement
- Faulty throttle body (actuator motor or position sensor)
- Faulty accelerator pedal position sensor(s) or poor correlation with throttle position
- Damaged wiring or poor connectors to throttle actuator or sensors
- Low or unstable battery/charging system voltage during adaptation
- Lost or corrupted adaptation data after battery disconnect or module replacement
Symptoms
- Malfunction Indicator Lamp (MIL) on
- Reduced engine power / limp-home mode with limited throttle response
- Fixed or reduced maximum engine speed and poor acceleration
- Inconsistent or delayed throttle response
- Stored throttle-related fault codes and inability to perform relearn
What to check
- Read and record freeze-frame data and all stored/related DTCs with BMW-compatible scan tool
- Verify battery voltage and charging system (must be stable during adaptation)
- Visually inspect throttle body connector and wiring for corrosion, damage, or loose pins
- Compare accelerator pedal sensor outputs vs throttle actual position using live data
- Attempt throttle adaptation/relearn using factory tool (ISTA/D) and capture error messages
- Inspect throttle body for carbon/deposits or mechanical obstruction
Signal parameters
- Accelerator pedal position sensor 1 (voltage or %): at rest ~0–5% (or ~0.5–1.0 V depending on vehicle)
- Accelerator pedal position sensor 2 (redundant): should closely match sensor 1
- Throttle command (target angle / %): follows pedal input command from DME
- Throttle actual (measured) angle / %: should track target within a few degrees or percent
- Throttle actuator motor current/effort: shows activity when adaptation commanded
- Battery voltage: should be >12.2 V during adaptation and charging >13.5 V with engine running
Diagnostic algorithm
- Connect a BMW-capable scanner, read all DTCs and freeze frame. Note any related pedal or throttle codes (e.g., P2135, P2101).
- Verify battery/resting/charging voltage. Charge or replace weak battery and ensure stable voltage before further tests.
- Visually inspect throttle body connector and wiring for damage, corrosion or poor pins; repair as needed.
- With ignition on (engine off), monitor pedal sensor 1 & 2 and throttle actual vs target. Confirm pedal sensors correlate and throttle moves when commanded by scan tool.
- Attempt a throttle valve adaptation/relearn procedure using factory diagnostic tool (follow tool prompts). Record any errors returned by the tool.
- If adaptation fails, remove and inspect throttle body for carbon or mechanical binding; clean if appropriate then retry adaptation.
- If cleaning/adaptation do not resolve, bench-test or replace the throttle body assembly (including internal sensors/actuator). After replacement, perform adaptation and clear codes.
- If throttle body and wiring check good but adaptation still fails, check DME for software updates, map faults, or perform DME diagnostics; consider ECU repair/reflash per manufacturer guidance.
- After repair and successful adaptation, clear codes and perform road test to confirm normal throttle response and that code does not return.
Likely causes
- Throttle body failing (stuck or motor not responding)
- Bad throttle position sensor (internal to throttle body)
- Incorrect pedal-to-throttle correlation (pedal sensor fault or wiring)
- Battery voltage drop during adaptation or weak battery
- Connector corrosion or harness damage at throttle body
- Adaptation not performed after throttle service or battery replacement
Fault status
Status
Throttle valve adaptation failed — system in limp-home. Check throttle body, pedal sensors, wiring and battery. Perform adaptation/relearn with BMW diagnostic tool.
Repair difficulty: Medium
Diagnostic time: 0.5-3 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P1633
GMC
P — Powertrain
Ignition Supply Power Circuit Low Voltage
Views:
UK: 26
EN: 45
RU: 30
AI status
Completed
Completed
100%
Causes
- Throttle body mechanical binding or carbon buildup preventing proper movement
- Faulty throttle body (actuator motor or position sensor)
- Faulty accelerator pedal position sensor(s) or poor correlation with throttle position
- Damaged wiring or poor connectors to throttle actuator or sensors
- Low or unstable battery/charging system voltage during adaptation
- Lost or corrupted adaptation data after battery disconnect or module replacement
Symptoms
- Malfunction Indicator Lamp (MIL) on
- Reduced engine power / limp-home mode with limited throttle response
- Fixed or reduced maximum engine speed and poor acceleration
- Inconsistent or delayed throttle response
- Stored throttle-related fault codes and inability to perform relearn
What to check
- Read and record freeze-frame data and all stored/related DTCs with BMW-compatible scan tool
- Verify battery voltage and charging system (must be stable during adaptation)
- Visually inspect throttle body connector and wiring for corrosion, damage, or loose pins
- Compare accelerator pedal sensor outputs vs throttle actual position using live data
- Attempt throttle adaptation/relearn using factory tool (ISTA/D) and capture error messages
- Inspect throttle body for carbon/deposits or mechanical obstruction
Signal parameters
- Accelerator pedal position sensor 1 (voltage or %): at rest ~0–5% (or ~0.5–1.0 V depending on vehicle)
- Accelerator pedal position sensor 2 (redundant): should closely match sensor 1
- Throttle command (target angle / %): follows pedal input command from DME
- Throttle actual (measured) angle / %: should track target within a few degrees or percent
- Throttle actuator motor current/effort: shows activity when adaptation commanded
- Battery voltage: should be >12.2 V during adaptation and charging >13.5 V with engine running
Diagnostic algorithm
- Connect a BMW-capable scanner, read all DTCs and freeze frame. Note any related pedal or throttle codes (e.g., P2135, P2101).
- Verify battery/resting/charging voltage. Charge or replace weak battery and ensure stable voltage before further tests.
- Visually inspect throttle body connector and wiring for damage, corrosion or poor pins; repair as needed.
- With ignition on (engine off), monitor pedal sensor 1 & 2 and throttle actual vs target. Confirm pedal sensors correlate and throttle moves when commanded by scan tool.
- Attempt a throttle valve adaptation/relearn procedure using factory diagnostic tool (follow tool prompts). Record any errors returned by the tool.
- If adaptation fails, remove and inspect throttle body for carbon or mechanical binding; clean if appropriate then retry adaptation.
- If cleaning/adaptation do not resolve, bench-test or replace the throttle body assembly (including internal sensors/actuator). After replacement, perform adaptation and clear codes.
- If throttle body and wiring check good but adaptation still fails, check DME for software updates, map faults, or perform DME diagnostics; consider ECU repair/reflash per manufacturer guidance.
- After repair and successful adaptation, clear codes and perform road test to confirm normal throttle response and that code does not return.
Likely causes
- Throttle body failing (stuck or motor not responding)
- Bad throttle position sensor (internal to throttle body)
- Incorrect pedal-to-throttle correlation (pedal sensor fault or wiring)
- Battery voltage drop during adaptation or weak battery
- Connector corrosion or harness damage at throttle body
- Adaptation not performed after throttle service or battery replacement
Fault status
Status
Throttle valve adaptation failed — system in limp-home. Check throttle body, pedal sensors, wiring and battery. Perform adaptation/relearn with BMW diagnostic tool.
Repair difficulty: Medium
Diagnostic time: 0.5-3 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P1633
HUMMER
P — Powertrain
Ignition 0 Switch Circuit
Views:
UK: 8
EN: 26
RU: 13
AI status
Completed
Completed
100%
Causes
- Throttle body mechanical binding or carbon buildup preventing proper movement
- Faulty throttle body (actuator motor or position sensor)
- Faulty accelerator pedal position sensor(s) or poor correlation with throttle position
- Damaged wiring or poor connectors to throttle actuator or sensors
- Low or unstable battery/charging system voltage during adaptation
- Lost or corrupted adaptation data after battery disconnect or module replacement
Symptoms
- Malfunction Indicator Lamp (MIL) on
- Reduced engine power / limp-home mode with limited throttle response
- Fixed or reduced maximum engine speed and poor acceleration
- Inconsistent or delayed throttle response
- Stored throttle-related fault codes and inability to perform relearn
What to check
- Read and record freeze-frame data and all stored/related DTCs with BMW-compatible scan tool
- Verify battery voltage and charging system (must be stable during adaptation)
- Visually inspect throttle body connector and wiring for corrosion, damage, or loose pins
- Compare accelerator pedal sensor outputs vs throttle actual position using live data
- Attempt throttle adaptation/relearn using factory tool (ISTA/D) and capture error messages
- Inspect throttle body for carbon/deposits or mechanical obstruction
Signal parameters
- Accelerator pedal position sensor 1 (voltage or %): at rest ~0–5% (or ~0.5–1.0 V depending on vehicle)
- Accelerator pedal position sensor 2 (redundant): should closely match sensor 1
- Throttle command (target angle / %): follows pedal input command from DME
- Throttle actual (measured) angle / %: should track target within a few degrees or percent
- Throttle actuator motor current/effort: shows activity when adaptation commanded
- Battery voltage: should be >12.2 V during adaptation and charging >13.5 V with engine running
Diagnostic algorithm
- Connect a BMW-capable scanner, read all DTCs and freeze frame. Note any related pedal or throttle codes (e.g., P2135, P2101).
- Verify battery/resting/charging voltage. Charge or replace weak battery and ensure stable voltage before further tests.
- Visually inspect throttle body connector and wiring for damage, corrosion or poor pins; repair as needed.
- With ignition on (engine off), monitor pedal sensor 1 & 2 and throttle actual vs target. Confirm pedal sensors correlate and throttle moves when commanded by scan tool.
- Attempt a throttle valve adaptation/relearn procedure using factory diagnostic tool (follow tool prompts). Record any errors returned by the tool.
- If adaptation fails, remove and inspect throttle body for carbon or mechanical binding; clean if appropriate then retry adaptation.
- If cleaning/adaptation do not resolve, bench-test or replace the throttle body assembly (including internal sensors/actuator). After replacement, perform adaptation and clear codes.
- If throttle body and wiring check good but adaptation still fails, check DME for software updates, map faults, or perform DME diagnostics; consider ECU repair/reflash per manufacturer guidance.
- After repair and successful adaptation, clear codes and perform road test to confirm normal throttle response and that code does not return.
Likely causes
- Throttle body failing (stuck or motor not responding)
- Bad throttle position sensor (internal to throttle body)
- Incorrect pedal-to-throttle correlation (pedal sensor fault or wiring)
- Battery voltage drop during adaptation or weak battery
- Connector corrosion or harness damage at throttle body
- Adaptation not performed after throttle service or battery replacement
Fault status
Status
Throttle valve adaptation failed — system in limp-home. Check throttle body, pedal sensors, wiring and battery. Perform adaptation/relearn with BMW diagnostic tool.
Repair difficulty: Medium
Diagnostic time: 0.5-3 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P1633
KIA
P — Powertrain
Battery Overcharge
Views:
UK: 22
EN: 45
RU: 29
AI status
Completed
Completed
100%
Causes
- Throttle body mechanical binding or carbon buildup preventing proper movement
- Faulty throttle body (actuator motor or position sensor)
- Faulty accelerator pedal position sensor(s) or poor correlation with throttle position
- Damaged wiring or poor connectors to throttle actuator or sensors
- Low or unstable battery/charging system voltage during adaptation
- Lost or corrupted adaptation data after battery disconnect or module replacement
Symptoms
- Malfunction Indicator Lamp (MIL) on
- Reduced engine power / limp-home mode with limited throttle response
- Fixed or reduced maximum engine speed and poor acceleration
- Inconsistent or delayed throttle response
- Stored throttle-related fault codes and inability to perform relearn
What to check
- Read and record freeze-frame data and all stored/related DTCs with BMW-compatible scan tool
- Verify battery voltage and charging system (must be stable during adaptation)
- Visually inspect throttle body connector and wiring for corrosion, damage, or loose pins
- Compare accelerator pedal sensor outputs vs throttle actual position using live data
- Attempt throttle adaptation/relearn using factory tool (ISTA/D) and capture error messages
- Inspect throttle body for carbon/deposits or mechanical obstruction
Signal parameters
- Accelerator pedal position sensor 1 (voltage or %): at rest ~0–5% (or ~0.5–1.0 V depending on vehicle)
- Accelerator pedal position sensor 2 (redundant): should closely match sensor 1
- Throttle command (target angle / %): follows pedal input command from DME
- Throttle actual (measured) angle / %: should track target within a few degrees or percent
- Throttle actuator motor current/effort: shows activity when adaptation commanded
- Battery voltage: should be >12.2 V during adaptation and charging >13.5 V with engine running
Diagnostic algorithm
- Connect a BMW-capable scanner, read all DTCs and freeze frame. Note any related pedal or throttle codes (e.g., P2135, P2101).
- Verify battery/resting/charging voltage. Charge or replace weak battery and ensure stable voltage before further tests.
- Visually inspect throttle body connector and wiring for damage, corrosion or poor pins; repair as needed.
- With ignition on (engine off), monitor pedal sensor 1 & 2 and throttle actual vs target. Confirm pedal sensors correlate and throttle moves when commanded by scan tool.
- Attempt a throttle valve adaptation/relearn procedure using factory diagnostic tool (follow tool prompts). Record any errors returned by the tool.
- If adaptation fails, remove and inspect throttle body for carbon or mechanical binding; clean if appropriate then retry adaptation.
- If cleaning/adaptation do not resolve, bench-test or replace the throttle body assembly (including internal sensors/actuator). After replacement, perform adaptation and clear codes.
- If throttle body and wiring check good but adaptation still fails, check DME for software updates, map faults, or perform DME diagnostics; consider ECU repair/reflash per manufacturer guidance.
- After repair and successful adaptation, clear codes and perform road test to confirm normal throttle response and that code does not return.
Likely causes
- Throttle body failing (stuck or motor not responding)
- Bad throttle position sensor (internal to throttle body)
- Incorrect pedal-to-throttle correlation (pedal sensor fault or wiring)
- Battery voltage drop during adaptation or weak battery
- Connector corrosion or harness damage at throttle body
- Adaptation not performed after throttle service or battery replacement
Fault status
Status
Throttle valve adaptation failed — system in limp-home. Check throttle body, pedal sensors, wiring and battery. Perform adaptation/relearn with BMW diagnostic tool.
Repair difficulty: Medium
Diagnostic time: 0.5-3 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P1633
LAND ROVER
P — Powertrain
accelerator (central processor, handheld unit)
Views:
UK: 5
EN: 19
RU: 9
AI status
Completed
Completed
100%
Causes
- Throttle body mechanical binding or carbon buildup preventing proper movement
- Faulty throttle body (actuator motor or position sensor)
- Faulty accelerator pedal position sensor(s) or poor correlation with throttle position
- Damaged wiring or poor connectors to throttle actuator or sensors
- Low or unstable battery/charging system voltage during adaptation
- Lost or corrupted adaptation data after battery disconnect or module replacement
Symptoms
- Malfunction Indicator Lamp (MIL) on
- Reduced engine power / limp-home mode with limited throttle response
- Fixed or reduced maximum engine speed and poor acceleration
- Inconsistent or delayed throttle response
- Stored throttle-related fault codes and inability to perform relearn
What to check
- Read and record freeze-frame data and all stored/related DTCs with BMW-compatible scan tool
- Verify battery voltage and charging system (must be stable during adaptation)
- Visually inspect throttle body connector and wiring for corrosion, damage, or loose pins
- Compare accelerator pedal sensor outputs vs throttle actual position using live data
- Attempt throttle adaptation/relearn using factory tool (ISTA/D) and capture error messages
- Inspect throttle body for carbon/deposits or mechanical obstruction
Signal parameters
- Accelerator pedal position sensor 1 (voltage or %): at rest ~0–5% (or ~0.5–1.0 V depending on vehicle)
- Accelerator pedal position sensor 2 (redundant): should closely match sensor 1
- Throttle command (target angle / %): follows pedal input command from DME
- Throttle actual (measured) angle / %: should track target within a few degrees or percent
- Throttle actuator motor current/effort: shows activity when adaptation commanded
- Battery voltage: should be >12.2 V during adaptation and charging >13.5 V with engine running
Diagnostic algorithm
- Connect a BMW-capable scanner, read all DTCs and freeze frame. Note any related pedal or throttle codes (e.g., P2135, P2101).
- Verify battery/resting/charging voltage. Charge or replace weak battery and ensure stable voltage before further tests.
- Visually inspect throttle body connector and wiring for damage, corrosion or poor pins; repair as needed.
- With ignition on (engine off), monitor pedal sensor 1 & 2 and throttle actual vs target. Confirm pedal sensors correlate and throttle moves when commanded by scan tool.
- Attempt a throttle valve adaptation/relearn procedure using factory diagnostic tool (follow tool prompts). Record any errors returned by the tool.
- If adaptation fails, remove and inspect throttle body for carbon or mechanical binding; clean if appropriate then retry adaptation.
- If cleaning/adaptation do not resolve, bench-test or replace the throttle body assembly (including internal sensors/actuator). After replacement, perform adaptation and clear codes.
- If throttle body and wiring check good but adaptation still fails, check DME for software updates, map faults, or perform DME diagnostics; consider ECU repair/reflash per manufacturer guidance.
- After repair and successful adaptation, clear codes and perform road test to confirm normal throttle response and that code does not return.
Likely causes
- Throttle body failing (stuck or motor not responding)
- Bad throttle position sensor (internal to throttle body)
- Incorrect pedal-to-throttle correlation (pedal sensor fault or wiring)
- Battery voltage drop during adaptation or weak battery
- Connector corrosion or harness damage at throttle body
- Adaptation not performed after throttle service or battery replacement
Fault status
Status
Throttle valve adaptation failed — system in limp-home. Check throttle body, pedal sensors, wiring and battery. Perform adaptation/relearn with BMW diagnostic tool.
Repair difficulty: Medium
Diagnostic time: 0.5-3 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P1633
LEXUS
P — Powertrain
ECM Malfunction ETCS Circuit
Views:
UK: 21
EN: 38
RU: 29
AI status
Completed
Completed
100%
Causes
- Throttle body mechanical binding or carbon buildup preventing proper movement
- Faulty throttle body (actuator motor or position sensor)
- Faulty accelerator pedal position sensor(s) or poor correlation with throttle position
- Damaged wiring or poor connectors to throttle actuator or sensors
- Low or unstable battery/charging system voltage during adaptation
- Lost or corrupted adaptation data after battery disconnect or module replacement
Symptoms
- Malfunction Indicator Lamp (MIL) on
- Reduced engine power / limp-home mode with limited throttle response
- Fixed or reduced maximum engine speed and poor acceleration
- Inconsistent or delayed throttle response
- Stored throttle-related fault codes and inability to perform relearn
What to check
- Read and record freeze-frame data and all stored/related DTCs with BMW-compatible scan tool
- Verify battery voltage and charging system (must be stable during adaptation)
- Visually inspect throttle body connector and wiring for corrosion, damage, or loose pins
- Compare accelerator pedal sensor outputs vs throttle actual position using live data
- Attempt throttle adaptation/relearn using factory tool (ISTA/D) and capture error messages
- Inspect throttle body for carbon/deposits or mechanical obstruction
Signal parameters
- Accelerator pedal position sensor 1 (voltage or %): at rest ~0–5% (or ~0.5–1.0 V depending on vehicle)
- Accelerator pedal position sensor 2 (redundant): should closely match sensor 1
- Throttle command (target angle / %): follows pedal input command from DME
- Throttle actual (measured) angle / %: should track target within a few degrees or percent
- Throttle actuator motor current/effort: shows activity when adaptation commanded
- Battery voltage: should be >12.2 V during adaptation and charging >13.5 V with engine running
Diagnostic algorithm
- Connect a BMW-capable scanner, read all DTCs and freeze frame. Note any related pedal or throttle codes (e.g., P2135, P2101).
- Verify battery/resting/charging voltage. Charge or replace weak battery and ensure stable voltage before further tests.
- Visually inspect throttle body connector and wiring for damage, corrosion or poor pins; repair as needed.
- With ignition on (engine off), monitor pedal sensor 1 & 2 and throttle actual vs target. Confirm pedal sensors correlate and throttle moves when commanded by scan tool.
- Attempt a throttle valve adaptation/relearn procedure using factory diagnostic tool (follow tool prompts). Record any errors returned by the tool.
- If adaptation fails, remove and inspect throttle body for carbon or mechanical binding; clean if appropriate then retry adaptation.
- If cleaning/adaptation do not resolve, bench-test or replace the throttle body assembly (including internal sensors/actuator). After replacement, perform adaptation and clear codes.
- If throttle body and wiring check good but adaptation still fails, check DME for software updates, map faults, or perform DME diagnostics; consider ECU repair/reflash per manufacturer guidance.
- After repair and successful adaptation, clear codes and perform road test to confirm normal throttle response and that code does not return.
Likely causes
- Throttle body failing (stuck or motor not responding)
- Bad throttle position sensor (internal to throttle body)
- Incorrect pedal-to-throttle correlation (pedal sensor fault or wiring)
- Battery voltage drop during adaptation or weak battery
- Connector corrosion or harness damage at throttle body
- Adaptation not performed after throttle service or battery replacement
Fault status
Status
Throttle valve adaptation failed — system in limp-home. Check throttle body, pedal sensors, wiring and battery. Perform adaptation/relearn with BMW diagnostic tool.
Repair difficulty: Medium
Diagnostic time: 0.5-3 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P1633
MAZDA
P — Powertrain
Battery Overcharge Fault
Views:
UK: 19
EN: 40
RU: 28
AI status
Completed
Completed
100%
Causes
- Throttle body mechanical binding or carbon buildup preventing proper movement
- Faulty throttle body (actuator motor or position sensor)
- Faulty accelerator pedal position sensor(s) or poor correlation with throttle position
- Damaged wiring or poor connectors to throttle actuator or sensors
- Low or unstable battery/charging system voltage during adaptation
- Lost or corrupted adaptation data after battery disconnect or module replacement
Symptoms
- Malfunction Indicator Lamp (MIL) on
- Reduced engine power / limp-home mode with limited throttle response
- Fixed or reduced maximum engine speed and poor acceleration
- Inconsistent or delayed throttle response
- Stored throttle-related fault codes and inability to perform relearn
What to check
- Read and record freeze-frame data and all stored/related DTCs with BMW-compatible scan tool
- Verify battery voltage and charging system (must be stable during adaptation)
- Visually inspect throttle body connector and wiring for corrosion, damage, or loose pins
- Compare accelerator pedal sensor outputs vs throttle actual position using live data
- Attempt throttle adaptation/relearn using factory tool (ISTA/D) and capture error messages
- Inspect throttle body for carbon/deposits or mechanical obstruction
Signal parameters
- Accelerator pedal position sensor 1 (voltage or %): at rest ~0–5% (or ~0.5–1.0 V depending on vehicle)
- Accelerator pedal position sensor 2 (redundant): should closely match sensor 1
- Throttle command (target angle / %): follows pedal input command from DME
- Throttle actual (measured) angle / %: should track target within a few degrees or percent
- Throttle actuator motor current/effort: shows activity when adaptation commanded
- Battery voltage: should be >12.2 V during adaptation and charging >13.5 V with engine running
Diagnostic algorithm
- Connect a BMW-capable scanner, read all DTCs and freeze frame. Note any related pedal or throttle codes (e.g., P2135, P2101).
- Verify battery/resting/charging voltage. Charge or replace weak battery and ensure stable voltage before further tests.
- Visually inspect throttle body connector and wiring for damage, corrosion or poor pins; repair as needed.
- With ignition on (engine off), monitor pedal sensor 1 & 2 and throttle actual vs target. Confirm pedal sensors correlate and throttle moves when commanded by scan tool.
- Attempt a throttle valve adaptation/relearn procedure using factory diagnostic tool (follow tool prompts). Record any errors returned by the tool.
- If adaptation fails, remove and inspect throttle body for carbon or mechanical binding; clean if appropriate then retry adaptation.
- If cleaning/adaptation do not resolve, bench-test or replace the throttle body assembly (including internal sensors/actuator). After replacement, perform adaptation and clear codes.
- If throttle body and wiring check good but adaptation still fails, check DME for software updates, map faults, or perform DME diagnostics; consider ECU repair/reflash per manufacturer guidance.
- After repair and successful adaptation, clear codes and perform road test to confirm normal throttle response and that code does not return.
Likely causes
- Throttle body failing (stuck or motor not responding)
- Bad throttle position sensor (internal to throttle body)
- Incorrect pedal-to-throttle correlation (pedal sensor fault or wiring)
- Battery voltage drop during adaptation or weak battery
- Connector corrosion or harness damage at throttle body
- Adaptation not performed after throttle service or battery replacement
Fault status
Status
Throttle valve adaptation failed — system in limp-home. Check throttle body, pedal sensors, wiring and battery. Perform adaptation/relearn with BMW diagnostic tool.
Repair difficulty: Medium
Diagnostic time: 0.5-3 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P1633
OLDSMOBILE
P — Powertrain
Ignition Supply Power Circuit Low Voltage
Views:
UK: 20
EN: 45
RU: 29
AI status
Completed
Completed
100%
Causes
- Throttle body mechanical binding or carbon buildup preventing proper movement
- Faulty throttle body (actuator motor or position sensor)
- Faulty accelerator pedal position sensor(s) or poor correlation with throttle position
- Damaged wiring or poor connectors to throttle actuator or sensors
- Low or unstable battery/charging system voltage during adaptation
- Lost or corrupted adaptation data after battery disconnect or module replacement
Symptoms
- Malfunction Indicator Lamp (MIL) on
- Reduced engine power / limp-home mode with limited throttle response
- Fixed or reduced maximum engine speed and poor acceleration
- Inconsistent or delayed throttle response
- Stored throttle-related fault codes and inability to perform relearn
What to check
- Read and record freeze-frame data and all stored/related DTCs with BMW-compatible scan tool
- Verify battery voltage and charging system (must be stable during adaptation)
- Visually inspect throttle body connector and wiring for corrosion, damage, or loose pins
- Compare accelerator pedal sensor outputs vs throttle actual position using live data
- Attempt throttle adaptation/relearn using factory tool (ISTA/D) and capture error messages
- Inspect throttle body for carbon/deposits or mechanical obstruction
Signal parameters
- Accelerator pedal position sensor 1 (voltage or %): at rest ~0–5% (or ~0.5–1.0 V depending on vehicle)
- Accelerator pedal position sensor 2 (redundant): should closely match sensor 1
- Throttle command (target angle / %): follows pedal input command from DME
- Throttle actual (measured) angle / %: should track target within a few degrees or percent
- Throttle actuator motor current/effort: shows activity when adaptation commanded
- Battery voltage: should be >12.2 V during adaptation and charging >13.5 V with engine running
Diagnostic algorithm
- Connect a BMW-capable scanner, read all DTCs and freeze frame. Note any related pedal or throttle codes (e.g., P2135, P2101).
- Verify battery/resting/charging voltage. Charge or replace weak battery and ensure stable voltage before further tests.
- Visually inspect throttle body connector and wiring for damage, corrosion or poor pins; repair as needed.
- With ignition on (engine off), monitor pedal sensor 1 & 2 and throttle actual vs target. Confirm pedal sensors correlate and throttle moves when commanded by scan tool.
- Attempt a throttle valve adaptation/relearn procedure using factory diagnostic tool (follow tool prompts). Record any errors returned by the tool.
- If adaptation fails, remove and inspect throttle body for carbon or mechanical binding; clean if appropriate then retry adaptation.
- If cleaning/adaptation do not resolve, bench-test or replace the throttle body assembly (including internal sensors/actuator). After replacement, perform adaptation and clear codes.
- If throttle body and wiring check good but adaptation still fails, check DME for software updates, map faults, or perform DME diagnostics; consider ECU repair/reflash per manufacturer guidance.
- After repair and successful adaptation, clear codes and perform road test to confirm normal throttle response and that code does not return.
Likely causes
- Throttle body failing (stuck or motor not responding)
- Bad throttle position sensor (internal to throttle body)
- Incorrect pedal-to-throttle correlation (pedal sensor fault or wiring)
- Battery voltage drop during adaptation or weak battery
- Connector corrosion or harness damage at throttle body
- Adaptation not performed after throttle service or battery replacement
Fault status
Status
Throttle valve adaptation failed — system in limp-home. Check throttle body, pedal sensors, wiring and battery. Perform adaptation/relearn with BMW diagnostic tool.
Repair difficulty: Medium
Diagnostic time: 0.5-3 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P1633
Other
P — Powertrain
KAM Voltage Too Low
Views:
UK: 23
EN: 40
RU: 30
AI status
Completed
Completed
100%
Causes
- Throttle body mechanical binding or carbon buildup preventing proper movement
- Faulty throttle body (actuator motor or position sensor)
- Faulty accelerator pedal position sensor(s) or poor correlation with throttle position
- Damaged wiring or poor connectors to throttle actuator or sensors
- Low or unstable battery/charging system voltage during adaptation
- Lost or corrupted adaptation data after battery disconnect or module replacement
Symptoms
- Malfunction Indicator Lamp (MIL) on
- Reduced engine power / limp-home mode with limited throttle response
- Fixed or reduced maximum engine speed and poor acceleration
- Inconsistent or delayed throttle response
- Stored throttle-related fault codes and inability to perform relearn
What to check
- Read and record freeze-frame data and all stored/related DTCs with BMW-compatible scan tool
- Verify battery voltage and charging system (must be stable during adaptation)
- Visually inspect throttle body connector and wiring for corrosion, damage, or loose pins
- Compare accelerator pedal sensor outputs vs throttle actual position using live data
- Attempt throttle adaptation/relearn using factory tool (ISTA/D) and capture error messages
- Inspect throttle body for carbon/deposits or mechanical obstruction
Signal parameters
- Accelerator pedal position sensor 1 (voltage or %): at rest ~0–5% (or ~0.5–1.0 V depending on vehicle)
- Accelerator pedal position sensor 2 (redundant): should closely match sensor 1
- Throttle command (target angle / %): follows pedal input command from DME
- Throttle actual (measured) angle / %: should track target within a few degrees or percent
- Throttle actuator motor current/effort: shows activity when adaptation commanded
- Battery voltage: should be >12.2 V during adaptation and charging >13.5 V with engine running
Diagnostic algorithm
- Connect a BMW-capable scanner, read all DTCs and freeze frame. Note any related pedal or throttle codes (e.g., P2135, P2101).
- Verify battery/resting/charging voltage. Charge or replace weak battery and ensure stable voltage before further tests.
- Visually inspect throttle body connector and wiring for damage, corrosion or poor pins; repair as needed.
- With ignition on (engine off), monitor pedal sensor 1 & 2 and throttle actual vs target. Confirm pedal sensors correlate and throttle moves when commanded by scan tool.
- Attempt a throttle valve adaptation/relearn procedure using factory diagnostic tool (follow tool prompts). Record any errors returned by the tool.
- If adaptation fails, remove and inspect throttle body for carbon or mechanical binding; clean if appropriate then retry adaptation.
- If cleaning/adaptation do not resolve, bench-test or replace the throttle body assembly (including internal sensors/actuator). After replacement, perform adaptation and clear codes.
- If throttle body and wiring check good but adaptation still fails, check DME for software updates, map faults, or perform DME diagnostics; consider ECU repair/reflash per manufacturer guidance.
- After repair and successful adaptation, clear codes and perform road test to confirm normal throttle response and that code does not return.
Likely causes
- Throttle body failing (stuck or motor not responding)
- Bad throttle position sensor (internal to throttle body)
- Incorrect pedal-to-throttle correlation (pedal sensor fault or wiring)
- Battery voltage drop during adaptation or weak battery
- Connector corrosion or harness damage at throttle body
- Adaptation not performed after throttle service or battery replacement
Fault status
Status
Throttle valve adaptation failed — system in limp-home. Check throttle body, pedal sensors, wiring and battery. Perform adaptation/relearn with BMW diagnostic tool.
Repair difficulty: Medium
Diagnostic time: 0.5-3 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P1633
PEUGEOT
P — Powertrain
Ignition-on ECU supply control short circuit to earth or open circuit
Views:
UK: 2
EN: 10
RU: 4
AI status
Completed
Completed
100%
Causes
- Throttle body mechanical binding or carbon buildup preventing proper movement
- Faulty throttle body (actuator motor or position sensor)
- Faulty accelerator pedal position sensor(s) or poor correlation with throttle position
- Damaged wiring or poor connectors to throttle actuator or sensors
- Low or unstable battery/charging system voltage during adaptation
- Lost or corrupted adaptation data after battery disconnect or module replacement
Symptoms
- Malfunction Indicator Lamp (MIL) on
- Reduced engine power / limp-home mode with limited throttle response
- Fixed or reduced maximum engine speed and poor acceleration
- Inconsistent or delayed throttle response
- Stored throttle-related fault codes and inability to perform relearn
What to check
- Read and record freeze-frame data and all stored/related DTCs with BMW-compatible scan tool
- Verify battery voltage and charging system (must be stable during adaptation)
- Visually inspect throttle body connector and wiring for corrosion, damage, or loose pins
- Compare accelerator pedal sensor outputs vs throttle actual position using live data
- Attempt throttle adaptation/relearn using factory tool (ISTA/D) and capture error messages
- Inspect throttle body for carbon/deposits or mechanical obstruction
Signal parameters
- Accelerator pedal position sensor 1 (voltage or %): at rest ~0–5% (or ~0.5–1.0 V depending on vehicle)
- Accelerator pedal position sensor 2 (redundant): should closely match sensor 1
- Throttle command (target angle / %): follows pedal input command from DME
- Throttle actual (measured) angle / %: should track target within a few degrees or percent
- Throttle actuator motor current/effort: shows activity when adaptation commanded
- Battery voltage: should be >12.2 V during adaptation and charging >13.5 V with engine running
Diagnostic algorithm
- Connect a BMW-capable scanner, read all DTCs and freeze frame. Note any related pedal or throttle codes (e.g., P2135, P2101).
- Verify battery/resting/charging voltage. Charge or replace weak battery and ensure stable voltage before further tests.
- Visually inspect throttle body connector and wiring for damage, corrosion or poor pins; repair as needed.
- With ignition on (engine off), monitor pedal sensor 1 & 2 and throttle actual vs target. Confirm pedal sensors correlate and throttle moves when commanded by scan tool.
- Attempt a throttle valve adaptation/relearn procedure using factory diagnostic tool (follow tool prompts). Record any errors returned by the tool.
- If adaptation fails, remove and inspect throttle body for carbon or mechanical binding; clean if appropriate then retry adaptation.
- If cleaning/adaptation do not resolve, bench-test or replace the throttle body assembly (including internal sensors/actuator). After replacement, perform adaptation and clear codes.
- If throttle body and wiring check good but adaptation still fails, check DME for software updates, map faults, or perform DME diagnostics; consider ECU repair/reflash per manufacturer guidance.
- After repair and successful adaptation, clear codes and perform road test to confirm normal throttle response and that code does not return.
Likely causes
- Throttle body failing (stuck or motor not responding)
- Bad throttle position sensor (internal to throttle body)
- Incorrect pedal-to-throttle correlation (pedal sensor fault or wiring)
- Battery voltage drop during adaptation or weak battery
- Connector corrosion or harness damage at throttle body
- Adaptation not performed after throttle service or battery replacement
Fault status
Status
Throttle valve adaptation failed — system in limp-home. Check throttle body, pedal sensors, wiring and battery. Perform adaptation/relearn with BMW diagnostic tool.
Repair difficulty: Medium
Diagnostic time: 0.5-3 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P1633
RAM
P — Powertrain
TCM Internal - Test External Watchdog Performance
Views:
UK: 3
EN: 11
RU: 5
AI status
Completed
Completed
100%
Causes
- Throttle body mechanical binding or carbon buildup preventing proper movement
- Faulty throttle body (actuator motor or position sensor)
- Faulty accelerator pedal position sensor(s) or poor correlation with throttle position
- Damaged wiring or poor connectors to throttle actuator or sensors
- Low or unstable battery/charging system voltage during adaptation
- Lost or corrupted adaptation data after battery disconnect or module replacement
Symptoms
- Malfunction Indicator Lamp (MIL) on
- Reduced engine power / limp-home mode with limited throttle response
- Fixed or reduced maximum engine speed and poor acceleration
- Inconsistent or delayed throttle response
- Stored throttle-related fault codes and inability to perform relearn
What to check
- Read and record freeze-frame data and all stored/related DTCs with BMW-compatible scan tool
- Verify battery voltage and charging system (must be stable during adaptation)
- Visually inspect throttle body connector and wiring for corrosion, damage, or loose pins
- Compare accelerator pedal sensor outputs vs throttle actual position using live data
- Attempt throttle adaptation/relearn using factory tool (ISTA/D) and capture error messages
- Inspect throttle body for carbon/deposits or mechanical obstruction
Signal parameters
- Accelerator pedal position sensor 1 (voltage or %): at rest ~0–5% (or ~0.5–1.0 V depending on vehicle)
- Accelerator pedal position sensor 2 (redundant): should closely match sensor 1
- Throttle command (target angle / %): follows pedal input command from DME
- Throttle actual (measured) angle / %: should track target within a few degrees or percent
- Throttle actuator motor current/effort: shows activity when adaptation commanded
- Battery voltage: should be >12.2 V during adaptation and charging >13.5 V with engine running
Diagnostic algorithm
- Connect a BMW-capable scanner, read all DTCs and freeze frame. Note any related pedal or throttle codes (e.g., P2135, P2101).
- Verify battery/resting/charging voltage. Charge or replace weak battery and ensure stable voltage before further tests.
- Visually inspect throttle body connector and wiring for damage, corrosion or poor pins; repair as needed.
- With ignition on (engine off), monitor pedal sensor 1 & 2 and throttle actual vs target. Confirm pedal sensors correlate and throttle moves when commanded by scan tool.
- Attempt a throttle valve adaptation/relearn procedure using factory diagnostic tool (follow tool prompts). Record any errors returned by the tool.
- If adaptation fails, remove and inspect throttle body for carbon or mechanical binding; clean if appropriate then retry adaptation.
- If cleaning/adaptation do not resolve, bench-test or replace the throttle body assembly (including internal sensors/actuator). After replacement, perform adaptation and clear codes.
- If throttle body and wiring check good but adaptation still fails, check DME for software updates, map faults, or perform DME diagnostics; consider ECU repair/reflash per manufacturer guidance.
- After repair and successful adaptation, clear codes and perform road test to confirm normal throttle response and that code does not return.
Likely causes
- Throttle body failing (stuck or motor not responding)
- Bad throttle position sensor (internal to throttle body)
- Incorrect pedal-to-throttle correlation (pedal sensor fault or wiring)
- Battery voltage drop during adaptation or weak battery
- Connector corrosion or harness damage at throttle body
- Adaptation not performed after throttle service or battery replacement
Fault status
Status
Throttle valve adaptation failed — system in limp-home. Check throttle body, pedal sensors, wiring and battery. Perform adaptation/relearn with BMW diagnostic tool.
Repair difficulty: Medium
Diagnostic time: 0.5-3 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P1633
SAAB
P — Powertrain
Internal Control Module Malfunction
Views:
UK: 3
EN: 11
RU: 9
AI status
Completed
Completed
100%
Causes
- Throttle body mechanical binding or carbon buildup preventing proper movement
- Faulty throttle body (actuator motor or position sensor)
- Faulty accelerator pedal position sensor(s) or poor correlation with throttle position
- Damaged wiring or poor connectors to throttle actuator or sensors
- Low or unstable battery/charging system voltage during adaptation
- Lost or corrupted adaptation data after battery disconnect or module replacement
Symptoms
- Malfunction Indicator Lamp (MIL) on
- Reduced engine power / limp-home mode with limited throttle response
- Fixed or reduced maximum engine speed and poor acceleration
- Inconsistent or delayed throttle response
- Stored throttle-related fault codes and inability to perform relearn
What to check
- Read and record freeze-frame data and all stored/related DTCs with BMW-compatible scan tool
- Verify battery voltage and charging system (must be stable during adaptation)
- Visually inspect throttle body connector and wiring for corrosion, damage, or loose pins
- Compare accelerator pedal sensor outputs vs throttle actual position using live data
- Attempt throttle adaptation/relearn using factory tool (ISTA/D) and capture error messages
- Inspect throttle body for carbon/deposits or mechanical obstruction
Signal parameters
- Accelerator pedal position sensor 1 (voltage or %): at rest ~0–5% (or ~0.5–1.0 V depending on vehicle)
- Accelerator pedal position sensor 2 (redundant): should closely match sensor 1
- Throttle command (target angle / %): follows pedal input command from DME
- Throttle actual (measured) angle / %: should track target within a few degrees or percent
- Throttle actuator motor current/effort: shows activity when adaptation commanded
- Battery voltage: should be >12.2 V during adaptation and charging >13.5 V with engine running
Diagnostic algorithm
- Connect a BMW-capable scanner, read all DTCs and freeze frame. Note any related pedal or throttle codes (e.g., P2135, P2101).
- Verify battery/resting/charging voltage. Charge or replace weak battery and ensure stable voltage before further tests.
- Visually inspect throttle body connector and wiring for damage, corrosion or poor pins; repair as needed.
- With ignition on (engine off), monitor pedal sensor 1 & 2 and throttle actual vs target. Confirm pedal sensors correlate and throttle moves when commanded by scan tool.
- Attempt a throttle valve adaptation/relearn procedure using factory diagnostic tool (follow tool prompts). Record any errors returned by the tool.
- If adaptation fails, remove and inspect throttle body for carbon or mechanical binding; clean if appropriate then retry adaptation.
- If cleaning/adaptation do not resolve, bench-test or replace the throttle body assembly (including internal sensors/actuator). After replacement, perform adaptation and clear codes.
- If throttle body and wiring check good but adaptation still fails, check DME for software updates, map faults, or perform DME diagnostics; consider ECU repair/reflash per manufacturer guidance.
- After repair and successful adaptation, clear codes and perform road test to confirm normal throttle response and that code does not return.
Likely causes
- Throttle body failing (stuck or motor not responding)
- Bad throttle position sensor (internal to throttle body)
- Incorrect pedal-to-throttle correlation (pedal sensor fault or wiring)
- Battery voltage drop during adaptation or weak battery
- Connector corrosion or harness damage at throttle body
- Adaptation not performed after throttle service or battery replacement
Fault status
Status
Throttle valve adaptation failed — system in limp-home. Check throttle body, pedal sensors, wiring and battery. Perform adaptation/relearn with BMW diagnostic tool.
Repair difficulty: Medium
Diagnostic time: 0.5-3 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P1633
SATURN
P — Powertrain
Ignition Supply Power Circuit Low Voltage
Views:
UK: 24
EN: 52
RU: 32
AI status
Completed
Completed
100%
Causes
- Throttle body mechanical binding or carbon buildup preventing proper movement
- Faulty throttle body (actuator motor or position sensor)
- Faulty accelerator pedal position sensor(s) or poor correlation with throttle position
- Damaged wiring or poor connectors to throttle actuator or sensors
- Low or unstable battery/charging system voltage during adaptation
- Lost or corrupted adaptation data after battery disconnect or module replacement
Symptoms
- Malfunction Indicator Lamp (MIL) on
- Reduced engine power / limp-home mode with limited throttle response
- Fixed or reduced maximum engine speed and poor acceleration
- Inconsistent or delayed throttle response
- Stored throttle-related fault codes and inability to perform relearn
What to check
- Read and record freeze-frame data and all stored/related DTCs with BMW-compatible scan tool
- Verify battery voltage and charging system (must be stable during adaptation)
- Visually inspect throttle body connector and wiring for corrosion, damage, or loose pins
- Compare accelerator pedal sensor outputs vs throttle actual position using live data
- Attempt throttle adaptation/relearn using factory tool (ISTA/D) and capture error messages
- Inspect throttle body for carbon/deposits or mechanical obstruction
Signal parameters
- Accelerator pedal position sensor 1 (voltage or %): at rest ~0–5% (or ~0.5–1.0 V depending on vehicle)
- Accelerator pedal position sensor 2 (redundant): should closely match sensor 1
- Throttle command (target angle / %): follows pedal input command from DME
- Throttle actual (measured) angle / %: should track target within a few degrees or percent
- Throttle actuator motor current/effort: shows activity when adaptation commanded
- Battery voltage: should be >12.2 V during adaptation and charging >13.5 V with engine running
Diagnostic algorithm
- Connect a BMW-capable scanner, read all DTCs and freeze frame. Note any related pedal or throttle codes (e.g., P2135, P2101).
- Verify battery/resting/charging voltage. Charge or replace weak battery and ensure stable voltage before further tests.
- Visually inspect throttle body connector and wiring for damage, corrosion or poor pins; repair as needed.
- With ignition on (engine off), monitor pedal sensor 1 & 2 and throttle actual vs target. Confirm pedal sensors correlate and throttle moves when commanded by scan tool.
- Attempt a throttle valve adaptation/relearn procedure using factory diagnostic tool (follow tool prompts). Record any errors returned by the tool.
- If adaptation fails, remove and inspect throttle body for carbon or mechanical binding; clean if appropriate then retry adaptation.
- If cleaning/adaptation do not resolve, bench-test or replace the throttle body assembly (including internal sensors/actuator). After replacement, perform adaptation and clear codes.
- If throttle body and wiring check good but adaptation still fails, check DME for software updates, map faults, or perform DME diagnostics; consider ECU repair/reflash per manufacturer guidance.
- After repair and successful adaptation, clear codes and perform road test to confirm normal throttle response and that code does not return.
Likely causes
- Throttle body failing (stuck or motor not responding)
- Bad throttle position sensor (internal to throttle body)
- Incorrect pedal-to-throttle correlation (pedal sensor fault or wiring)
- Battery voltage drop during adaptation or weak battery
- Connector corrosion or harness damage at throttle body
- Adaptation not performed after throttle service or battery replacement
Fault status
Status
Throttle valve adaptation failed — system in limp-home. Check throttle body, pedal sensors, wiring and battery. Perform adaptation/relearn with BMW diagnostic tool.
Repair difficulty: Medium
Diagnostic time: 0.5-3 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P1633
TOYOTA
P — Powertrain
ECM
Views:
UK: 22
EN: 45
RU: 30
AI status
Completed
Completed
100%
Causes
- Throttle body mechanical binding or carbon buildup preventing proper movement
- Faulty throttle body (actuator motor or position sensor)
- Faulty accelerator pedal position sensor(s) or poor correlation with throttle position
- Damaged wiring or poor connectors to throttle actuator or sensors
- Low or unstable battery/charging system voltage during adaptation
- Lost or corrupted adaptation data after battery disconnect or module replacement
Symptoms
- Malfunction Indicator Lamp (MIL) on
- Reduced engine power / limp-home mode with limited throttle response
- Fixed or reduced maximum engine speed and poor acceleration
- Inconsistent or delayed throttle response
- Stored throttle-related fault codes and inability to perform relearn
What to check
- Read and record freeze-frame data and all stored/related DTCs with BMW-compatible scan tool
- Verify battery voltage and charging system (must be stable during adaptation)
- Visually inspect throttle body connector and wiring for corrosion, damage, or loose pins
- Compare accelerator pedal sensor outputs vs throttle actual position using live data
- Attempt throttle adaptation/relearn using factory tool (ISTA/D) and capture error messages
- Inspect throttle body for carbon/deposits or mechanical obstruction
Signal parameters
- Accelerator pedal position sensor 1 (voltage or %): at rest ~0–5% (or ~0.5–1.0 V depending on vehicle)
- Accelerator pedal position sensor 2 (redundant): should closely match sensor 1
- Throttle command (target angle / %): follows pedal input command from DME
- Throttle actual (measured) angle / %: should track target within a few degrees or percent
- Throttle actuator motor current/effort: shows activity when adaptation commanded
- Battery voltage: should be >12.2 V during adaptation and charging >13.5 V with engine running
Diagnostic algorithm
- Connect a BMW-capable scanner, read all DTCs and freeze frame. Note any related pedal or throttle codes (e.g., P2135, P2101).
- Verify battery/resting/charging voltage. Charge or replace weak battery and ensure stable voltage before further tests.
- Visually inspect throttle body connector and wiring for damage, corrosion or poor pins; repair as needed.
- With ignition on (engine off), monitor pedal sensor 1 & 2 and throttle actual vs target. Confirm pedal sensors correlate and throttle moves when commanded by scan tool.
- Attempt a throttle valve adaptation/relearn procedure using factory diagnostic tool (follow tool prompts). Record any errors returned by the tool.
- If adaptation fails, remove and inspect throttle body for carbon or mechanical binding; clean if appropriate then retry adaptation.
- If cleaning/adaptation do not resolve, bench-test or replace the throttle body assembly (including internal sensors/actuator). After replacement, perform adaptation and clear codes.
- If throttle body and wiring check good but adaptation still fails, check DME for software updates, map faults, or perform DME diagnostics; consider ECU repair/reflash per manufacturer guidance.
- After repair and successful adaptation, clear codes and perform road test to confirm normal throttle response and that code does not return.
Likely causes
- Throttle body failing (stuck or motor not responding)
- Bad throttle position sensor (internal to throttle body)
- Incorrect pedal-to-throttle correlation (pedal sensor fault or wiring)
- Battery voltage drop during adaptation or weak battery
- Connector corrosion or harness damage at throttle body
- Adaptation not performed after throttle service or battery replacement
Fault status
Status
Throttle valve adaptation failed — system in limp-home. Check throttle body, pedal sensors, wiring and battery. Perform adaptation/relearn with BMW diagnostic tool.
Repair difficulty: Medium
Diagnostic time: 0.5-3 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P1633
VOLKSWAGEN
P — Powertrain
Accelerator Pedal Position Sensor 2 Signal Too Low
Views:
UK: 25
EN: 83
RU: 31
AI status
Completed
Completed
100%
Causes
- Throttle body mechanical binding or carbon buildup preventing proper movement
- Faulty throttle body (actuator motor or position sensor)
- Faulty accelerator pedal position sensor(s) or poor correlation with throttle position
- Damaged wiring or poor connectors to throttle actuator or sensors
- Low or unstable battery/charging system voltage during adaptation
- Lost or corrupted adaptation data after battery disconnect or module replacement
Symptoms
- Malfunction Indicator Lamp (MIL) on
- Reduced engine power / limp-home mode with limited throttle response
- Fixed or reduced maximum engine speed and poor acceleration
- Inconsistent or delayed throttle response
- Stored throttle-related fault codes and inability to perform relearn
What to check
- Read and record freeze-frame data and all stored/related DTCs with BMW-compatible scan tool
- Verify battery voltage and charging system (must be stable during adaptation)
- Visually inspect throttle body connector and wiring for corrosion, damage, or loose pins
- Compare accelerator pedal sensor outputs vs throttle actual position using live data
- Attempt throttle adaptation/relearn using factory tool (ISTA/D) and capture error messages
- Inspect throttle body for carbon/deposits or mechanical obstruction
Signal parameters
- Accelerator pedal position sensor 1 (voltage or %): at rest ~0–5% (or ~0.5–1.0 V depending on vehicle)
- Accelerator pedal position sensor 2 (redundant): should closely match sensor 1
- Throttle command (target angle / %): follows pedal input command from DME
- Throttle actual (measured) angle / %: should track target within a few degrees or percent
- Throttle actuator motor current/effort: shows activity when adaptation commanded
- Battery voltage: should be >12.2 V during adaptation and charging >13.5 V with engine running
Diagnostic algorithm
- Connect a BMW-capable scanner, read all DTCs and freeze frame. Note any related pedal or throttle codes (e.g., P2135, P2101).
- Verify battery/resting/charging voltage. Charge or replace weak battery and ensure stable voltage before further tests.
- Visually inspect throttle body connector and wiring for damage, corrosion or poor pins; repair as needed.
- With ignition on (engine off), monitor pedal sensor 1 & 2 and throttle actual vs target. Confirm pedal sensors correlate and throttle moves when commanded by scan tool.
- Attempt a throttle valve adaptation/relearn procedure using factory diagnostic tool (follow tool prompts). Record any errors returned by the tool.
- If adaptation fails, remove and inspect throttle body for carbon or mechanical binding; clean if appropriate then retry adaptation.
- If cleaning/adaptation do not resolve, bench-test or replace the throttle body assembly (including internal sensors/actuator). After replacement, perform adaptation and clear codes.
- If throttle body and wiring check good but adaptation still fails, check DME for software updates, map faults, or perform DME diagnostics; consider ECU repair/reflash per manufacturer guidance.
- After repair and successful adaptation, clear codes and perform road test to confirm normal throttle response and that code does not return.
Likely causes
- Throttle body failing (stuck or motor not responding)
- Bad throttle position sensor (internal to throttle body)
- Incorrect pedal-to-throttle correlation (pedal sensor fault or wiring)
- Battery voltage drop during adaptation or weak battery
- Connector corrosion or harness damage at throttle body
- Adaptation not performed after throttle service or battery replacement
Fault status
Status
Throttle valve adaptation failed — system in limp-home. Check throttle body, pedal sensors, wiring and battery. Perform adaptation/relearn with BMW diagnostic tool.
Repair difficulty: Medium
Diagnostic time: 0.5-3 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email