Code
P1683
ALFA ROMEO
P — Powertrain
Motorised throttle recovery fault
AI status
Completed
Completed
100%
Causes
- Carbon build-up or mechanical binding in the throttle body preventing free movement
- Faulty throttle actuator motor or internal throttle body electronics
- Damaged wiring, poor connector contact or corroded terminals to throttle body
- Low battery voltage or poor ground affecting actuator operation
- Faulty accelerator pedal position sensor(s) or signal mismatch
- ECU or throttle control module software/firmware error or need for adaptation/relearn
Symptoms
- MIL (Malfunction Indicator Lamp) illuminated
- Reduced engine power / limp-mode activation
- Erratic or high/low idle
- Poor throttle response, hesitation or inability to accelerate normally
- Possible trouble starting if throttle cannot achieve required position
What to check
- Read stored/active DTCs and freeze frame data with an appropriate scan tool
- Check battery voltage and charging system at rest and under cranking (should be >12.0–12.5 V nominal)
- Visually inspect throttle body connector and wiring for damage, corrosion, or loose pins
- Inspect throttle body for carbon build-up or mechanical obstruction
- Compare accelerator pedal sensor signals and throttle position using the scan tool
- Perform an actuator test (commanded open/close) and observe target vs actual throttle angle
Signal parameters
- Battery/ignition supply voltage to throttle body (V)
- Actual throttle angle/position (%) or degrees
- Target throttle angle/position commanded by ECU
- Throttle actuator motor current (A) or motor drive feedback if available
- Accelerator Pedal Position Sensor 1 and 2 voltages/percent
- CAN/serial communication status between throttle module and ECU (if applicable)
Diagnostic algorithm
- Connect a full-function diagnostic scanner. Record the DTC, freeze frame and any related codes.
- Verify battery and charging system condition. Recharge or replace a weak battery before further testing.
- Visually inspect wiring and connectors at the throttle body and ECU. Repair any damaged wires or poor connections.
- With ignition on, monitor pedal position sensors and throttle position (target vs actual) while gently actuating the pedal. Look for inconsistencies or no movement.
- Command the throttle actuator using the scan tool (actuator test). Observe actual throttle movement and listen for unusual noises. If it fails to follow commands or binds, remove the throttle body for inspection.
- Remove and inspect the throttle body for carbon buildup, sticking plates, or debris. Clean using manufacturer-approved throttle body cleaner if mechanical sticking is present.
- After cleaning, repeat actuator/scan tests. If the throttle now moves correctly, perform the recommended throttle adaptation/relearn procedure per manufacturer instructions.
- If actuator still fails or current draw is abnormal, replace the throttle body assembly (or throttle module) and repeat adaptation/relearn.
- If replacement does not clear the issue, inspect/repair wiring harness power and ground feeds and re-check ECU communication. Consider ECU or throttle control module fault if wiring is confirmed good.
- Clear codes and road-test. Verify no recurrence and that adaptation values are within spec.
Likely causes
- Throttle body is dirty/sticking (carbon deposits) restricting motor recovery
- Intermittent wiring/connector fault at the throttle body (corrosion, broken wire)
- Throttle actuator motor failure or internal throttle module electronics fault
- Low system voltage during recovery (weak battery, bad alternator output, poor ground)
- Incorrect or out-of-range pedal position sensor input causing control mismatch
Fault status
Status
Throttle actuator did not complete the commanded recovery/movement. MIL set. Engine may run in reduced power mode until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
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Code
P1683
BUICK
P — Powertrain
Driver 5 Line 3
AI status
Completed
Completed
100%
Causes
- Carbon build-up or mechanical binding in the throttle body preventing free movement
- Faulty throttle actuator motor or internal throttle body electronics
- Damaged wiring, poor connector contact or corroded terminals to throttle body
- Low battery voltage or poor ground affecting actuator operation
- Faulty accelerator pedal position sensor(s) or signal mismatch
- ECU or throttle control module software/firmware error or need for adaptation/relearn
Symptoms
- MIL (Malfunction Indicator Lamp) illuminated
- Reduced engine power / limp-mode activation
- Erratic or high/low idle
- Poor throttle response, hesitation or inability to accelerate normally
- Possible trouble starting if throttle cannot achieve required position
What to check
- Read stored/active DTCs and freeze frame data with an appropriate scan tool
- Check battery voltage and charging system at rest and under cranking (should be >12.0–12.5 V nominal)
- Visually inspect throttle body connector and wiring for damage, corrosion, or loose pins
- Inspect throttle body for carbon build-up or mechanical obstruction
- Compare accelerator pedal sensor signals and throttle position using the scan tool
- Perform an actuator test (commanded open/close) and observe target vs actual throttle angle
Signal parameters
- Battery/ignition supply voltage to throttle body (V)
- Actual throttle angle/position (%) or degrees
- Target throttle angle/position commanded by ECU
- Throttle actuator motor current (A) or motor drive feedback if available
- Accelerator Pedal Position Sensor 1 and 2 voltages/percent
- CAN/serial communication status between throttle module and ECU (if applicable)
Diagnostic algorithm
- Connect a full-function diagnostic scanner. Record the DTC, freeze frame and any related codes.
- Verify battery and charging system condition. Recharge or replace a weak battery before further testing.
- Visually inspect wiring and connectors at the throttle body and ECU. Repair any damaged wires or poor connections.
- With ignition on, monitor pedal position sensors and throttle position (target vs actual) while gently actuating the pedal. Look for inconsistencies or no movement.
- Command the throttle actuator using the scan tool (actuator test). Observe actual throttle movement and listen for unusual noises. If it fails to follow commands or binds, remove the throttle body for inspection.
- Remove and inspect the throttle body for carbon buildup, sticking plates, or debris. Clean using manufacturer-approved throttle body cleaner if mechanical sticking is present.
- After cleaning, repeat actuator/scan tests. If the throttle now moves correctly, perform the recommended throttle adaptation/relearn procedure per manufacturer instructions.
- If actuator still fails or current draw is abnormal, replace the throttle body assembly (or throttle module) and repeat adaptation/relearn.
- If replacement does not clear the issue, inspect/repair wiring harness power and ground feeds and re-check ECU communication. Consider ECU or throttle control module fault if wiring is confirmed good.
- Clear codes and road-test. Verify no recurrence and that adaptation values are within spec.
Likely causes
- Throttle body is dirty/sticking (carbon deposits) restricting motor recovery
- Intermittent wiring/connector fault at the throttle body (corrosion, broken wire)
- Throttle actuator motor failure or internal throttle module electronics fault
- Low system voltage during recovery (weak battery, bad alternator output, poor ground)
- Incorrect or out-of-range pedal position sensor input causing control mismatch
Fault status
Status
Throttle actuator did not complete the commanded recovery/movement. MIL set. Engine may run in reduced power mode until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
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Code
P1683
CADILLAC
P — Powertrain
Driver 5 Line 3
AI status
Completed
Completed
100%
Causes
- Carbon build-up or mechanical binding in the throttle body preventing free movement
- Faulty throttle actuator motor or internal throttle body electronics
- Damaged wiring, poor connector contact or corroded terminals to throttle body
- Low battery voltage or poor ground affecting actuator operation
- Faulty accelerator pedal position sensor(s) or signal mismatch
- ECU or throttle control module software/firmware error or need for adaptation/relearn
Symptoms
- MIL (Malfunction Indicator Lamp) illuminated
- Reduced engine power / limp-mode activation
- Erratic or high/low idle
- Poor throttle response, hesitation or inability to accelerate normally
- Possible trouble starting if throttle cannot achieve required position
What to check
- Read stored/active DTCs and freeze frame data with an appropriate scan tool
- Check battery voltage and charging system at rest and under cranking (should be >12.0–12.5 V nominal)
- Visually inspect throttle body connector and wiring for damage, corrosion, or loose pins
- Inspect throttle body for carbon build-up or mechanical obstruction
- Compare accelerator pedal sensor signals and throttle position using the scan tool
- Perform an actuator test (commanded open/close) and observe target vs actual throttle angle
Signal parameters
- Battery/ignition supply voltage to throttle body (V)
- Actual throttle angle/position (%) or degrees
- Target throttle angle/position commanded by ECU
- Throttle actuator motor current (A) or motor drive feedback if available
- Accelerator Pedal Position Sensor 1 and 2 voltages/percent
- CAN/serial communication status between throttle module and ECU (if applicable)
Diagnostic algorithm
- Connect a full-function diagnostic scanner. Record the DTC, freeze frame and any related codes.
- Verify battery and charging system condition. Recharge or replace a weak battery before further testing.
- Visually inspect wiring and connectors at the throttle body and ECU. Repair any damaged wires or poor connections.
- With ignition on, monitor pedal position sensors and throttle position (target vs actual) while gently actuating the pedal. Look for inconsistencies or no movement.
- Command the throttle actuator using the scan tool (actuator test). Observe actual throttle movement and listen for unusual noises. If it fails to follow commands or binds, remove the throttle body for inspection.
- Remove and inspect the throttle body for carbon buildup, sticking plates, or debris. Clean using manufacturer-approved throttle body cleaner if mechanical sticking is present.
- After cleaning, repeat actuator/scan tests. If the throttle now moves correctly, perform the recommended throttle adaptation/relearn procedure per manufacturer instructions.
- If actuator still fails or current draw is abnormal, replace the throttle body assembly (or throttle module) and repeat adaptation/relearn.
- If replacement does not clear the issue, inspect/repair wiring harness power and ground feeds and re-check ECU communication. Consider ECU or throttle control module fault if wiring is confirmed good.
- Clear codes and road-test. Verify no recurrence and that adaptation values are within spec.
Likely causes
- Throttle body is dirty/sticking (carbon deposits) restricting motor recovery
- Intermittent wiring/connector fault at the throttle body (corrosion, broken wire)
- Throttle actuator motor failure or internal throttle module electronics fault
- Low system voltage during recovery (weak battery, bad alternator output, poor ground)
- Incorrect or out-of-range pedal position sensor input causing control mismatch
Fault status
Status
Throttle actuator did not complete the commanded recovery/movement. MIL set. Engine may run in reduced power mode until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
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Code
P1683
CHEVROLET
P — Powertrain
Driver 5 Line 3
AI status
Completed
Completed
100%
Causes
- Carbon build-up or mechanical binding in the throttle body preventing free movement
- Faulty throttle actuator motor or internal throttle body electronics
- Damaged wiring, poor connector contact or corroded terminals to throttle body
- Low battery voltage or poor ground affecting actuator operation
- Faulty accelerator pedal position sensor(s) or signal mismatch
- ECU or throttle control module software/firmware error or need for adaptation/relearn
Symptoms
- MIL (Malfunction Indicator Lamp) illuminated
- Reduced engine power / limp-mode activation
- Erratic or high/low idle
- Poor throttle response, hesitation or inability to accelerate normally
- Possible trouble starting if throttle cannot achieve required position
What to check
- Read stored/active DTCs and freeze frame data with an appropriate scan tool
- Check battery voltage and charging system at rest and under cranking (should be >12.0–12.5 V nominal)
- Visually inspect throttle body connector and wiring for damage, corrosion, or loose pins
- Inspect throttle body for carbon build-up or mechanical obstruction
- Compare accelerator pedal sensor signals and throttle position using the scan tool
- Perform an actuator test (commanded open/close) and observe target vs actual throttle angle
Signal parameters
- Battery/ignition supply voltage to throttle body (V)
- Actual throttle angle/position (%) or degrees
- Target throttle angle/position commanded by ECU
- Throttle actuator motor current (A) or motor drive feedback if available
- Accelerator Pedal Position Sensor 1 and 2 voltages/percent
- CAN/serial communication status between throttle module and ECU (if applicable)
Diagnostic algorithm
- Connect a full-function diagnostic scanner. Record the DTC, freeze frame and any related codes.
- Verify battery and charging system condition. Recharge or replace a weak battery before further testing.
- Visually inspect wiring and connectors at the throttle body and ECU. Repair any damaged wires or poor connections.
- With ignition on, monitor pedal position sensors and throttle position (target vs actual) while gently actuating the pedal. Look for inconsistencies or no movement.
- Command the throttle actuator using the scan tool (actuator test). Observe actual throttle movement and listen for unusual noises. If it fails to follow commands or binds, remove the throttle body for inspection.
- Remove and inspect the throttle body for carbon buildup, sticking plates, or debris. Clean using manufacturer-approved throttle body cleaner if mechanical sticking is present.
- After cleaning, repeat actuator/scan tests. If the throttle now moves correctly, perform the recommended throttle adaptation/relearn procedure per manufacturer instructions.
- If actuator still fails or current draw is abnormal, replace the throttle body assembly (or throttle module) and repeat adaptation/relearn.
- If replacement does not clear the issue, inspect/repair wiring harness power and ground feeds and re-check ECU communication. Consider ECU or throttle control module fault if wiring is confirmed good.
- Clear codes and road-test. Verify no recurrence and that adaptation values are within spec.
Likely causes
- Throttle body is dirty/sticking (carbon deposits) restricting motor recovery
- Intermittent wiring/connector fault at the throttle body (corrosion, broken wire)
- Throttle actuator motor failure or internal throttle module electronics fault
- Low system voltage during recovery (weak battery, bad alternator output, poor ground)
- Incorrect or out-of-range pedal position sensor input causing control mismatch
Fault status
Status
Throttle actuator did not complete the commanded recovery/movement. MIL set. Engine may run in reduced power mode until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
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Code
P1683
CHRYSLER
P — Powertrain
Speed Control Power Relay Or Speed Control 12 Volt Driver Circuit Open Or Shorted
AI status
Completed
Completed
100%
Causes
- Carbon build-up or mechanical binding in the throttle body preventing free movement
- Faulty throttle actuator motor or internal throttle body electronics
- Damaged wiring, poor connector contact or corroded terminals to throttle body
- Low battery voltage or poor ground affecting actuator operation
- Faulty accelerator pedal position sensor(s) or signal mismatch
- ECU or throttle control module software/firmware error or need for adaptation/relearn
Symptoms
- MIL (Malfunction Indicator Lamp) illuminated
- Reduced engine power / limp-mode activation
- Erratic or high/low idle
- Poor throttle response, hesitation or inability to accelerate normally
- Possible trouble starting if throttle cannot achieve required position
What to check
- Read stored/active DTCs and freeze frame data with an appropriate scan tool
- Check battery voltage and charging system at rest and under cranking (should be >12.0–12.5 V nominal)
- Visually inspect throttle body connector and wiring for damage, corrosion, or loose pins
- Inspect throttle body for carbon build-up or mechanical obstruction
- Compare accelerator pedal sensor signals and throttle position using the scan tool
- Perform an actuator test (commanded open/close) and observe target vs actual throttle angle
Signal parameters
- Battery/ignition supply voltage to throttle body (V)
- Actual throttle angle/position (%) or degrees
- Target throttle angle/position commanded by ECU
- Throttle actuator motor current (A) or motor drive feedback if available
- Accelerator Pedal Position Sensor 1 and 2 voltages/percent
- CAN/serial communication status between throttle module and ECU (if applicable)
Diagnostic algorithm
- Connect a full-function diagnostic scanner. Record the DTC, freeze frame and any related codes.
- Verify battery and charging system condition. Recharge or replace a weak battery before further testing.
- Visually inspect wiring and connectors at the throttle body and ECU. Repair any damaged wires or poor connections.
- With ignition on, monitor pedal position sensors and throttle position (target vs actual) while gently actuating the pedal. Look for inconsistencies or no movement.
- Command the throttle actuator using the scan tool (actuator test). Observe actual throttle movement and listen for unusual noises. If it fails to follow commands or binds, remove the throttle body for inspection.
- Remove and inspect the throttle body for carbon buildup, sticking plates, or debris. Clean using manufacturer-approved throttle body cleaner if mechanical sticking is present.
- After cleaning, repeat actuator/scan tests. If the throttle now moves correctly, perform the recommended throttle adaptation/relearn procedure per manufacturer instructions.
- If actuator still fails or current draw is abnormal, replace the throttle body assembly (or throttle module) and repeat adaptation/relearn.
- If replacement does not clear the issue, inspect/repair wiring harness power and ground feeds and re-check ECU communication. Consider ECU or throttle control module fault if wiring is confirmed good.
- Clear codes and road-test. Verify no recurrence and that adaptation values are within spec.
Likely causes
- Throttle body is dirty/sticking (carbon deposits) restricting motor recovery
- Intermittent wiring/connector fault at the throttle body (corrosion, broken wire)
- Throttle actuator motor failure or internal throttle module electronics fault
- Low system voltage during recovery (weak battery, bad alternator output, poor ground)
- Incorrect or out-of-range pedal position sensor input causing control mismatch
Fault status
Status
Throttle actuator did not complete the commanded recovery/movement. MIL set. Engine may run in reduced power mode until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
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Code
P1683
DODGE
P — Powertrain
Speed Control Power Relay Or Speed Control 12 Volt Driver Circuit Open Or Shorted
AI status
Completed
Completed
100%
Causes
- Carbon build-up or mechanical binding in the throttle body preventing free movement
- Faulty throttle actuator motor or internal throttle body electronics
- Damaged wiring, poor connector contact or corroded terminals to throttle body
- Low battery voltage or poor ground affecting actuator operation
- Faulty accelerator pedal position sensor(s) or signal mismatch
- ECU or throttle control module software/firmware error or need for adaptation/relearn
Symptoms
- MIL (Malfunction Indicator Lamp) illuminated
- Reduced engine power / limp-mode activation
- Erratic or high/low idle
- Poor throttle response, hesitation or inability to accelerate normally
- Possible trouble starting if throttle cannot achieve required position
What to check
- Read stored/active DTCs and freeze frame data with an appropriate scan tool
- Check battery voltage and charging system at rest and under cranking (should be >12.0–12.5 V nominal)
- Visually inspect throttle body connector and wiring for damage, corrosion, or loose pins
- Inspect throttle body for carbon build-up or mechanical obstruction
- Compare accelerator pedal sensor signals and throttle position using the scan tool
- Perform an actuator test (commanded open/close) and observe target vs actual throttle angle
Signal parameters
- Battery/ignition supply voltage to throttle body (V)
- Actual throttle angle/position (%) or degrees
- Target throttle angle/position commanded by ECU
- Throttle actuator motor current (A) or motor drive feedback if available
- Accelerator Pedal Position Sensor 1 and 2 voltages/percent
- CAN/serial communication status between throttle module and ECU (if applicable)
Diagnostic algorithm
- Connect a full-function diagnostic scanner. Record the DTC, freeze frame and any related codes.
- Verify battery and charging system condition. Recharge or replace a weak battery before further testing.
- Visually inspect wiring and connectors at the throttle body and ECU. Repair any damaged wires or poor connections.
- With ignition on, monitor pedal position sensors and throttle position (target vs actual) while gently actuating the pedal. Look for inconsistencies or no movement.
- Command the throttle actuator using the scan tool (actuator test). Observe actual throttle movement and listen for unusual noises. If it fails to follow commands or binds, remove the throttle body for inspection.
- Remove and inspect the throttle body for carbon buildup, sticking plates, or debris. Clean using manufacturer-approved throttle body cleaner if mechanical sticking is present.
- After cleaning, repeat actuator/scan tests. If the throttle now moves correctly, perform the recommended throttle adaptation/relearn procedure per manufacturer instructions.
- If actuator still fails or current draw is abnormal, replace the throttle body assembly (or throttle module) and repeat adaptation/relearn.
- If replacement does not clear the issue, inspect/repair wiring harness power and ground feeds and re-check ECU communication. Consider ECU or throttle control module fault if wiring is confirmed good.
- Clear codes and road-test. Verify no recurrence and that adaptation values are within spec.
Likely causes
- Throttle body is dirty/sticking (carbon deposits) restricting motor recovery
- Intermittent wiring/connector fault at the throttle body (corrosion, broken wire)
- Throttle actuator motor failure or internal throttle module electronics fault
- Low system voltage during recovery (weak battery, bad alternator output, poor ground)
- Incorrect or out-of-range pedal position sensor input causing control mismatch
Fault status
Status
Throttle actuator did not complete the commanded recovery/movement. MIL set. Engine may run in reduced power mode until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
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Code
P1683
FIAT
P — Powertrain
Motorised throttle recovery fault
AI status
Completed
Completed
100%
Causes
- Carbon build-up or mechanical binding in the throttle body preventing free movement
- Faulty throttle actuator motor or internal throttle body electronics
- Damaged wiring, poor connector contact or corroded terminals to throttle body
- Low battery voltage or poor ground affecting actuator operation
- Faulty accelerator pedal position sensor(s) or signal mismatch
- ECU or throttle control module software/firmware error or need for adaptation/relearn
Symptoms
- MIL (Malfunction Indicator Lamp) illuminated
- Reduced engine power / limp-mode activation
- Erratic or high/low idle
- Poor throttle response, hesitation or inability to accelerate normally
- Possible trouble starting if throttle cannot achieve required position
What to check
- Read stored/active DTCs and freeze frame data with an appropriate scan tool
- Check battery voltage and charging system at rest and under cranking (should be >12.0–12.5 V nominal)
- Visually inspect throttle body connector and wiring for damage, corrosion, or loose pins
- Inspect throttle body for carbon build-up or mechanical obstruction
- Compare accelerator pedal sensor signals and throttle position using the scan tool
- Perform an actuator test (commanded open/close) and observe target vs actual throttle angle
Signal parameters
- Battery/ignition supply voltage to throttle body (V)
- Actual throttle angle/position (%) or degrees
- Target throttle angle/position commanded by ECU
- Throttle actuator motor current (A) or motor drive feedback if available
- Accelerator Pedal Position Sensor 1 and 2 voltages/percent
- CAN/serial communication status between throttle module and ECU (if applicable)
Diagnostic algorithm
- Connect a full-function diagnostic scanner. Record the DTC, freeze frame and any related codes.
- Verify battery and charging system condition. Recharge or replace a weak battery before further testing.
- Visually inspect wiring and connectors at the throttle body and ECU. Repair any damaged wires or poor connections.
- With ignition on, monitor pedal position sensors and throttle position (target vs actual) while gently actuating the pedal. Look for inconsistencies or no movement.
- Command the throttle actuator using the scan tool (actuator test). Observe actual throttle movement and listen for unusual noises. If it fails to follow commands or binds, remove the throttle body for inspection.
- Remove and inspect the throttle body for carbon buildup, sticking plates, or debris. Clean using manufacturer-approved throttle body cleaner if mechanical sticking is present.
- After cleaning, repeat actuator/scan tests. If the throttle now moves correctly, perform the recommended throttle adaptation/relearn procedure per manufacturer instructions.
- If actuator still fails or current draw is abnormal, replace the throttle body assembly (or throttle module) and repeat adaptation/relearn.
- If replacement does not clear the issue, inspect/repair wiring harness power and ground feeds and re-check ECU communication. Consider ECU or throttle control module fault if wiring is confirmed good.
- Clear codes and road-test. Verify no recurrence and that adaptation values are within spec.
Likely causes
- Throttle body is dirty/sticking (carbon deposits) restricting motor recovery
- Intermittent wiring/connector fault at the throttle body (corrosion, broken wire)
- Throttle actuator motor failure or internal throttle module electronics fault
- Low system voltage during recovery (weak battery, bad alternator output, poor ground)
- Incorrect or out-of-range pedal position sensor input causing control mismatch
Fault status
Status
Throttle actuator did not complete the commanded recovery/movement. MIL set. Engine may run in reduced power mode until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
Similar codes
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Code
P1683
GM
P — Powertrain
Driver 5 Line 3
AI status
Completed
Completed
100%
Causes
- Carbon build-up or mechanical binding in the throttle body preventing free movement
- Faulty throttle actuator motor or internal throttle body electronics
- Damaged wiring, poor connector contact or corroded terminals to throttle body
- Low battery voltage or poor ground affecting actuator operation
- Faulty accelerator pedal position sensor(s) or signal mismatch
- ECU or throttle control module software/firmware error or need for adaptation/relearn
Symptoms
- MIL (Malfunction Indicator Lamp) illuminated
- Reduced engine power / limp-mode activation
- Erratic or high/low idle
- Poor throttle response, hesitation or inability to accelerate normally
- Possible trouble starting if throttle cannot achieve required position
What to check
- Read stored/active DTCs and freeze frame data with an appropriate scan tool
- Check battery voltage and charging system at rest and under cranking (should be >12.0–12.5 V nominal)
- Visually inspect throttle body connector and wiring for damage, corrosion, or loose pins
- Inspect throttle body for carbon build-up or mechanical obstruction
- Compare accelerator pedal sensor signals and throttle position using the scan tool
- Perform an actuator test (commanded open/close) and observe target vs actual throttle angle
Signal parameters
- Battery/ignition supply voltage to throttle body (V)
- Actual throttle angle/position (%) or degrees
- Target throttle angle/position commanded by ECU
- Throttle actuator motor current (A) or motor drive feedback if available
- Accelerator Pedal Position Sensor 1 and 2 voltages/percent
- CAN/serial communication status between throttle module and ECU (if applicable)
Diagnostic algorithm
- Connect a full-function diagnostic scanner. Record the DTC, freeze frame and any related codes.
- Verify battery and charging system condition. Recharge or replace a weak battery before further testing.
- Visually inspect wiring and connectors at the throttle body and ECU. Repair any damaged wires or poor connections.
- With ignition on, monitor pedal position sensors and throttle position (target vs actual) while gently actuating the pedal. Look for inconsistencies or no movement.
- Command the throttle actuator using the scan tool (actuator test). Observe actual throttle movement and listen for unusual noises. If it fails to follow commands or binds, remove the throttle body for inspection.
- Remove and inspect the throttle body for carbon buildup, sticking plates, or debris. Clean using manufacturer-approved throttle body cleaner if mechanical sticking is present.
- After cleaning, repeat actuator/scan tests. If the throttle now moves correctly, perform the recommended throttle adaptation/relearn procedure per manufacturer instructions.
- If actuator still fails or current draw is abnormal, replace the throttle body assembly (or throttle module) and repeat adaptation/relearn.
- If replacement does not clear the issue, inspect/repair wiring harness power and ground feeds and re-check ECU communication. Consider ECU or throttle control module fault if wiring is confirmed good.
- Clear codes and road-test. Verify no recurrence and that adaptation values are within spec.
Likely causes
- Throttle body is dirty/sticking (carbon deposits) restricting motor recovery
- Intermittent wiring/connector fault at the throttle body (corrosion, broken wire)
- Throttle actuator motor failure or internal throttle module electronics fault
- Low system voltage during recovery (weak battery, bad alternator output, poor ground)
- Incorrect or out-of-range pedal position sensor input causing control mismatch
Fault status
Status
Throttle actuator did not complete the commanded recovery/movement. MIL set. Engine may run in reduced power mode until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
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Code
P1683
GMC
P — Powertrain
Driver 5 Line 3
AI status
Completed
Completed
100%
Causes
- Carbon build-up or mechanical binding in the throttle body preventing free movement
- Faulty throttle actuator motor or internal throttle body electronics
- Damaged wiring, poor connector contact or corroded terminals to throttle body
- Low battery voltage or poor ground affecting actuator operation
- Faulty accelerator pedal position sensor(s) or signal mismatch
- ECU or throttle control module software/firmware error or need for adaptation/relearn
Symptoms
- MIL (Malfunction Indicator Lamp) illuminated
- Reduced engine power / limp-mode activation
- Erratic or high/low idle
- Poor throttle response, hesitation or inability to accelerate normally
- Possible trouble starting if throttle cannot achieve required position
What to check
- Read stored/active DTCs and freeze frame data with an appropriate scan tool
- Check battery voltage and charging system at rest and under cranking (should be >12.0–12.5 V nominal)
- Visually inspect throttle body connector and wiring for damage, corrosion, or loose pins
- Inspect throttle body for carbon build-up or mechanical obstruction
- Compare accelerator pedal sensor signals and throttle position using the scan tool
- Perform an actuator test (commanded open/close) and observe target vs actual throttle angle
Signal parameters
- Battery/ignition supply voltage to throttle body (V)
- Actual throttle angle/position (%) or degrees
- Target throttle angle/position commanded by ECU
- Throttle actuator motor current (A) or motor drive feedback if available
- Accelerator Pedal Position Sensor 1 and 2 voltages/percent
- CAN/serial communication status between throttle module and ECU (if applicable)
Diagnostic algorithm
- Connect a full-function diagnostic scanner. Record the DTC, freeze frame and any related codes.
- Verify battery and charging system condition. Recharge or replace a weak battery before further testing.
- Visually inspect wiring and connectors at the throttle body and ECU. Repair any damaged wires or poor connections.
- With ignition on, monitor pedal position sensors and throttle position (target vs actual) while gently actuating the pedal. Look for inconsistencies or no movement.
- Command the throttle actuator using the scan tool (actuator test). Observe actual throttle movement and listen for unusual noises. If it fails to follow commands or binds, remove the throttle body for inspection.
- Remove and inspect the throttle body for carbon buildup, sticking plates, or debris. Clean using manufacturer-approved throttle body cleaner if mechanical sticking is present.
- After cleaning, repeat actuator/scan tests. If the throttle now moves correctly, perform the recommended throttle adaptation/relearn procedure per manufacturer instructions.
- If actuator still fails or current draw is abnormal, replace the throttle body assembly (or throttle module) and repeat adaptation/relearn.
- If replacement does not clear the issue, inspect/repair wiring harness power and ground feeds and re-check ECU communication. Consider ECU or throttle control module fault if wiring is confirmed good.
- Clear codes and road-test. Verify no recurrence and that adaptation values are within spec.
Likely causes
- Throttle body is dirty/sticking (carbon deposits) restricting motor recovery
- Intermittent wiring/connector fault at the throttle body (corrosion, broken wire)
- Throttle actuator motor failure or internal throttle module electronics fault
- Low system voltage during recovery (weak battery, bad alternator output, poor ground)
- Incorrect or out-of-range pedal position sensor input causing control mismatch
Fault status
Status
Throttle actuator did not complete the commanded recovery/movement. MIL set. Engine may run in reduced power mode until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
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Code
P1683
HUMMER
P — Powertrain
Driver 5 Line 3
AI status
Completed
Completed
100%
Causes
- Carbon build-up or mechanical binding in the throttle body preventing free movement
- Faulty throttle actuator motor or internal throttle body electronics
- Damaged wiring, poor connector contact or corroded terminals to throttle body
- Low battery voltage or poor ground affecting actuator operation
- Faulty accelerator pedal position sensor(s) or signal mismatch
- ECU or throttle control module software/firmware error or need for adaptation/relearn
Symptoms
- MIL (Malfunction Indicator Lamp) illuminated
- Reduced engine power / limp-mode activation
- Erratic or high/low idle
- Poor throttle response, hesitation or inability to accelerate normally
- Possible trouble starting if throttle cannot achieve required position
What to check
- Read stored/active DTCs and freeze frame data with an appropriate scan tool
- Check battery voltage and charging system at rest and under cranking (should be >12.0–12.5 V nominal)
- Visually inspect throttle body connector and wiring for damage, corrosion, or loose pins
- Inspect throttle body for carbon build-up or mechanical obstruction
- Compare accelerator pedal sensor signals and throttle position using the scan tool
- Perform an actuator test (commanded open/close) and observe target vs actual throttle angle
Signal parameters
- Battery/ignition supply voltage to throttle body (V)
- Actual throttle angle/position (%) or degrees
- Target throttle angle/position commanded by ECU
- Throttle actuator motor current (A) or motor drive feedback if available
- Accelerator Pedal Position Sensor 1 and 2 voltages/percent
- CAN/serial communication status between throttle module and ECU (if applicable)
Diagnostic algorithm
- Connect a full-function diagnostic scanner. Record the DTC, freeze frame and any related codes.
- Verify battery and charging system condition. Recharge or replace a weak battery before further testing.
- Visually inspect wiring and connectors at the throttle body and ECU. Repair any damaged wires or poor connections.
- With ignition on, monitor pedal position sensors and throttle position (target vs actual) while gently actuating the pedal. Look for inconsistencies or no movement.
- Command the throttle actuator using the scan tool (actuator test). Observe actual throttle movement and listen for unusual noises. If it fails to follow commands or binds, remove the throttle body for inspection.
- Remove and inspect the throttle body for carbon buildup, sticking plates, or debris. Clean using manufacturer-approved throttle body cleaner if mechanical sticking is present.
- After cleaning, repeat actuator/scan tests. If the throttle now moves correctly, perform the recommended throttle adaptation/relearn procedure per manufacturer instructions.
- If actuator still fails or current draw is abnormal, replace the throttle body assembly (or throttle module) and repeat adaptation/relearn.
- If replacement does not clear the issue, inspect/repair wiring harness power and ground feeds and re-check ECU communication. Consider ECU or throttle control module fault if wiring is confirmed good.
- Clear codes and road-test. Verify no recurrence and that adaptation values are within spec.
Likely causes
- Throttle body is dirty/sticking (carbon deposits) restricting motor recovery
- Intermittent wiring/connector fault at the throttle body (corrosion, broken wire)
- Throttle actuator motor failure or internal throttle module electronics fault
- Low system voltage during recovery (weak battery, bad alternator output, poor ground)
- Incorrect or out-of-range pedal position sensor input causing control mismatch
Fault status
Status
Throttle actuator did not complete the commanded recovery/movement. MIL set. Engine may run in reduced power mode until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
Similar codes
Repair manuals
Manual library for HUMMER
138
Browse 138 HUMMER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
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HUMMER: 2009
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HUMMER: 2007
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HUMMER: 2005
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HUMMER: 2004
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HUMMER: 2000
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HUMMER: 1999
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HUMMER: 1994
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HUMMER: 1993
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Code
P1683
JEEP
P — Powertrain
Speed Control Power Relay Or Speed Control 12 Volt Driver Circuit Open Or Shorted
AI status
Completed
Completed
100%
Causes
- Carbon build-up or mechanical binding in the throttle body preventing free movement
- Faulty throttle actuator motor or internal throttle body electronics
- Damaged wiring, poor connector contact or corroded terminals to throttle body
- Low battery voltage or poor ground affecting actuator operation
- Faulty accelerator pedal position sensor(s) or signal mismatch
- ECU or throttle control module software/firmware error or need for adaptation/relearn
Symptoms
- MIL (Malfunction Indicator Lamp) illuminated
- Reduced engine power / limp-mode activation
- Erratic or high/low idle
- Poor throttle response, hesitation or inability to accelerate normally
- Possible trouble starting if throttle cannot achieve required position
What to check
- Read stored/active DTCs and freeze frame data with an appropriate scan tool
- Check battery voltage and charging system at rest and under cranking (should be >12.0–12.5 V nominal)
- Visually inspect throttle body connector and wiring for damage, corrosion, or loose pins
- Inspect throttle body for carbon build-up or mechanical obstruction
- Compare accelerator pedal sensor signals and throttle position using the scan tool
- Perform an actuator test (commanded open/close) and observe target vs actual throttle angle
Signal parameters
- Battery/ignition supply voltage to throttle body (V)
- Actual throttle angle/position (%) or degrees
- Target throttle angle/position commanded by ECU
- Throttle actuator motor current (A) or motor drive feedback if available
- Accelerator Pedal Position Sensor 1 and 2 voltages/percent
- CAN/serial communication status between throttle module and ECU (if applicable)
Diagnostic algorithm
- Connect a full-function diagnostic scanner. Record the DTC, freeze frame and any related codes.
- Verify battery and charging system condition. Recharge or replace a weak battery before further testing.
- Visually inspect wiring and connectors at the throttle body and ECU. Repair any damaged wires or poor connections.
- With ignition on, monitor pedal position sensors and throttle position (target vs actual) while gently actuating the pedal. Look for inconsistencies or no movement.
- Command the throttle actuator using the scan tool (actuator test). Observe actual throttle movement and listen for unusual noises. If it fails to follow commands or binds, remove the throttle body for inspection.
- Remove and inspect the throttle body for carbon buildup, sticking plates, or debris. Clean using manufacturer-approved throttle body cleaner if mechanical sticking is present.
- After cleaning, repeat actuator/scan tests. If the throttle now moves correctly, perform the recommended throttle adaptation/relearn procedure per manufacturer instructions.
- If actuator still fails or current draw is abnormal, replace the throttle body assembly (or throttle module) and repeat adaptation/relearn.
- If replacement does not clear the issue, inspect/repair wiring harness power and ground feeds and re-check ECU communication. Consider ECU or throttle control module fault if wiring is confirmed good.
- Clear codes and road-test. Verify no recurrence and that adaptation values are within spec.
Likely causes
- Throttle body is dirty/sticking (carbon deposits) restricting motor recovery
- Intermittent wiring/connector fault at the throttle body (corrosion, broken wire)
- Throttle actuator motor failure or internal throttle module electronics fault
- Low system voltage during recovery (weak battery, bad alternator output, poor ground)
- Incorrect or out-of-range pedal position sensor input causing control mismatch
Fault status
Status
Throttle actuator did not complete the commanded recovery/movement. MIL set. Engine may run in reduced power mode until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
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Code
P1683
MAZDA
P — Powertrain
Metering Oil Pump Temperature Sensor Circuit
AI status
Completed
Completed
100%
Causes
- Carbon build-up or mechanical binding in the throttle body preventing free movement
- Faulty throttle actuator motor or internal throttle body electronics
- Damaged wiring, poor connector contact or corroded terminals to throttle body
- Low battery voltage or poor ground affecting actuator operation
- Faulty accelerator pedal position sensor(s) or signal mismatch
- ECU or throttle control module software/firmware error or need for adaptation/relearn
Symptoms
- MIL (Malfunction Indicator Lamp) illuminated
- Reduced engine power / limp-mode activation
- Erratic or high/low idle
- Poor throttle response, hesitation or inability to accelerate normally
- Possible trouble starting if throttle cannot achieve required position
What to check
- Read stored/active DTCs and freeze frame data with an appropriate scan tool
- Check battery voltage and charging system at rest and under cranking (should be >12.0–12.5 V nominal)
- Visually inspect throttle body connector and wiring for damage, corrosion, or loose pins
- Inspect throttle body for carbon build-up or mechanical obstruction
- Compare accelerator pedal sensor signals and throttle position using the scan tool
- Perform an actuator test (commanded open/close) and observe target vs actual throttle angle
Signal parameters
- Battery/ignition supply voltage to throttle body (V)
- Actual throttle angle/position (%) or degrees
- Target throttle angle/position commanded by ECU
- Throttle actuator motor current (A) or motor drive feedback if available
- Accelerator Pedal Position Sensor 1 and 2 voltages/percent
- CAN/serial communication status between throttle module and ECU (if applicable)
Diagnostic algorithm
- Connect a full-function diagnostic scanner. Record the DTC, freeze frame and any related codes.
- Verify battery and charging system condition. Recharge or replace a weak battery before further testing.
- Visually inspect wiring and connectors at the throttle body and ECU. Repair any damaged wires or poor connections.
- With ignition on, monitor pedal position sensors and throttle position (target vs actual) while gently actuating the pedal. Look for inconsistencies or no movement.
- Command the throttle actuator using the scan tool (actuator test). Observe actual throttle movement and listen for unusual noises. If it fails to follow commands or binds, remove the throttle body for inspection.
- Remove and inspect the throttle body for carbon buildup, sticking plates, or debris. Clean using manufacturer-approved throttle body cleaner if mechanical sticking is present.
- After cleaning, repeat actuator/scan tests. If the throttle now moves correctly, perform the recommended throttle adaptation/relearn procedure per manufacturer instructions.
- If actuator still fails or current draw is abnormal, replace the throttle body assembly (or throttle module) and repeat adaptation/relearn.
- If replacement does not clear the issue, inspect/repair wiring harness power and ground feeds and re-check ECU communication. Consider ECU or throttle control module fault if wiring is confirmed good.
- Clear codes and road-test. Verify no recurrence and that adaptation values are within spec.
Likely causes
- Throttle body is dirty/sticking (carbon deposits) restricting motor recovery
- Intermittent wiring/connector fault at the throttle body (corrosion, broken wire)
- Throttle actuator motor failure or internal throttle module electronics fault
- Low system voltage during recovery (weak battery, bad alternator output, poor ground)
- Incorrect or out-of-range pedal position sensor input causing control mismatch
Fault status
Status
Throttle actuator did not complete the commanded recovery/movement. MIL set. Engine may run in reduced power mode until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
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Code
P1683
MINI
P — Powertrain
Electronic throttle control monitor level 2/3 - idle speed 'b' calculation fault
AI status
Completed
Completed
100%
Causes
- Carbon build-up or mechanical binding in the throttle body preventing free movement
- Faulty throttle actuator motor or internal throttle body electronics
- Damaged wiring, poor connector contact or corroded terminals to throttle body
- Low battery voltage or poor ground affecting actuator operation
- Faulty accelerator pedal position sensor(s) or signal mismatch
- ECU or throttle control module software/firmware error or need for adaptation/relearn
Symptoms
- MIL (Malfunction Indicator Lamp) illuminated
- Reduced engine power / limp-mode activation
- Erratic or high/low idle
- Poor throttle response, hesitation or inability to accelerate normally
- Possible trouble starting if throttle cannot achieve required position
What to check
- Read stored/active DTCs and freeze frame data with an appropriate scan tool
- Check battery voltage and charging system at rest and under cranking (should be >12.0–12.5 V nominal)
- Visually inspect throttle body connector and wiring for damage, corrosion, or loose pins
- Inspect throttle body for carbon build-up or mechanical obstruction
- Compare accelerator pedal sensor signals and throttle position using the scan tool
- Perform an actuator test (commanded open/close) and observe target vs actual throttle angle
Signal parameters
- Battery/ignition supply voltage to throttle body (V)
- Actual throttle angle/position (%) or degrees
- Target throttle angle/position commanded by ECU
- Throttle actuator motor current (A) or motor drive feedback if available
- Accelerator Pedal Position Sensor 1 and 2 voltages/percent
- CAN/serial communication status between throttle module and ECU (if applicable)
Diagnostic algorithm
- Connect a full-function diagnostic scanner. Record the DTC, freeze frame and any related codes.
- Verify battery and charging system condition. Recharge or replace a weak battery before further testing.
- Visually inspect wiring and connectors at the throttle body and ECU. Repair any damaged wires or poor connections.
- With ignition on, monitor pedal position sensors and throttle position (target vs actual) while gently actuating the pedal. Look for inconsistencies or no movement.
- Command the throttle actuator using the scan tool (actuator test). Observe actual throttle movement and listen for unusual noises. If it fails to follow commands or binds, remove the throttle body for inspection.
- Remove and inspect the throttle body for carbon buildup, sticking plates, or debris. Clean using manufacturer-approved throttle body cleaner if mechanical sticking is present.
- After cleaning, repeat actuator/scan tests. If the throttle now moves correctly, perform the recommended throttle adaptation/relearn procedure per manufacturer instructions.
- If actuator still fails or current draw is abnormal, replace the throttle body assembly (or throttle module) and repeat adaptation/relearn.
- If replacement does not clear the issue, inspect/repair wiring harness power and ground feeds and re-check ECU communication. Consider ECU or throttle control module fault if wiring is confirmed good.
- Clear codes and road-test. Verify no recurrence and that adaptation values are within spec.
Likely causes
- Throttle body is dirty/sticking (carbon deposits) restricting motor recovery
- Intermittent wiring/connector fault at the throttle body (corrosion, broken wire)
- Throttle actuator motor failure or internal throttle module electronics fault
- Low system voltage during recovery (weak battery, bad alternator output, poor ground)
- Incorrect or out-of-range pedal position sensor input causing control mismatch
Fault status
Status
Throttle actuator did not complete the commanded recovery/movement. MIL set. Engine may run in reduced power mode until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
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Code
P1683
OLDSMOBILE
P — Powertrain
Driver 5 Line 3
AI status
Completed
Completed
100%
Causes
- Carbon build-up or mechanical binding in the throttle body preventing free movement
- Faulty throttle actuator motor or internal throttle body electronics
- Damaged wiring, poor connector contact or corroded terminals to throttle body
- Low battery voltage or poor ground affecting actuator operation
- Faulty accelerator pedal position sensor(s) or signal mismatch
- ECU or throttle control module software/firmware error or need for adaptation/relearn
Symptoms
- MIL (Malfunction Indicator Lamp) illuminated
- Reduced engine power / limp-mode activation
- Erratic or high/low idle
- Poor throttle response, hesitation or inability to accelerate normally
- Possible trouble starting if throttle cannot achieve required position
What to check
- Read stored/active DTCs and freeze frame data with an appropriate scan tool
- Check battery voltage and charging system at rest and under cranking (should be >12.0–12.5 V nominal)
- Visually inspect throttle body connector and wiring for damage, corrosion, or loose pins
- Inspect throttle body for carbon build-up or mechanical obstruction
- Compare accelerator pedal sensor signals and throttle position using the scan tool
- Perform an actuator test (commanded open/close) and observe target vs actual throttle angle
Signal parameters
- Battery/ignition supply voltage to throttle body (V)
- Actual throttle angle/position (%) or degrees
- Target throttle angle/position commanded by ECU
- Throttle actuator motor current (A) or motor drive feedback if available
- Accelerator Pedal Position Sensor 1 and 2 voltages/percent
- CAN/serial communication status between throttle module and ECU (if applicable)
Diagnostic algorithm
- Connect a full-function diagnostic scanner. Record the DTC, freeze frame and any related codes.
- Verify battery and charging system condition. Recharge or replace a weak battery before further testing.
- Visually inspect wiring and connectors at the throttle body and ECU. Repair any damaged wires or poor connections.
- With ignition on, monitor pedal position sensors and throttle position (target vs actual) while gently actuating the pedal. Look for inconsistencies or no movement.
- Command the throttle actuator using the scan tool (actuator test). Observe actual throttle movement and listen for unusual noises. If it fails to follow commands or binds, remove the throttle body for inspection.
- Remove and inspect the throttle body for carbon buildup, sticking plates, or debris. Clean using manufacturer-approved throttle body cleaner if mechanical sticking is present.
- After cleaning, repeat actuator/scan tests. If the throttle now moves correctly, perform the recommended throttle adaptation/relearn procedure per manufacturer instructions.
- If actuator still fails or current draw is abnormal, replace the throttle body assembly (or throttle module) and repeat adaptation/relearn.
- If replacement does not clear the issue, inspect/repair wiring harness power and ground feeds and re-check ECU communication. Consider ECU or throttle control module fault if wiring is confirmed good.
- Clear codes and road-test. Verify no recurrence and that adaptation values are within spec.
Likely causes
- Throttle body is dirty/sticking (carbon deposits) restricting motor recovery
- Intermittent wiring/connector fault at the throttle body (corrosion, broken wire)
- Throttle actuator motor failure or internal throttle module electronics fault
- Low system voltage during recovery (weak battery, bad alternator output, poor ground)
- Incorrect or out-of-range pedal position sensor input causing control mismatch
Fault status
Status
Throttle actuator did not complete the commanded recovery/movement. MIL set. Engine may run in reduced power mode until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
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Code
P1683
Other
P — Powertrain
Metering Oil Pump Temperature Sensor Circuit Malfunction
AI status
Completed
Completed
100%
Causes
- Carbon build-up or mechanical binding in the throttle body preventing free movement
- Faulty throttle actuator motor or internal throttle body electronics
- Damaged wiring, poor connector contact or corroded terminals to throttle body
- Low battery voltage or poor ground affecting actuator operation
- Faulty accelerator pedal position sensor(s) or signal mismatch
- ECU or throttle control module software/firmware error or need for adaptation/relearn
Symptoms
- MIL (Malfunction Indicator Lamp) illuminated
- Reduced engine power / limp-mode activation
- Erratic or high/low idle
- Poor throttle response, hesitation or inability to accelerate normally
- Possible trouble starting if throttle cannot achieve required position
What to check
- Read stored/active DTCs and freeze frame data with an appropriate scan tool
- Check battery voltage and charging system at rest and under cranking (should be >12.0–12.5 V nominal)
- Visually inspect throttle body connector and wiring for damage, corrosion, or loose pins
- Inspect throttle body for carbon build-up or mechanical obstruction
- Compare accelerator pedal sensor signals and throttle position using the scan tool
- Perform an actuator test (commanded open/close) and observe target vs actual throttle angle
Signal parameters
- Battery/ignition supply voltage to throttle body (V)
- Actual throttle angle/position (%) or degrees
- Target throttle angle/position commanded by ECU
- Throttle actuator motor current (A) or motor drive feedback if available
- Accelerator Pedal Position Sensor 1 and 2 voltages/percent
- CAN/serial communication status between throttle module and ECU (if applicable)
Diagnostic algorithm
- Connect a full-function diagnostic scanner. Record the DTC, freeze frame and any related codes.
- Verify battery and charging system condition. Recharge or replace a weak battery before further testing.
- Visually inspect wiring and connectors at the throttle body and ECU. Repair any damaged wires or poor connections.
- With ignition on, monitor pedal position sensors and throttle position (target vs actual) while gently actuating the pedal. Look for inconsistencies or no movement.
- Command the throttle actuator using the scan tool (actuator test). Observe actual throttle movement and listen for unusual noises. If it fails to follow commands or binds, remove the throttle body for inspection.
- Remove and inspect the throttle body for carbon buildup, sticking plates, or debris. Clean using manufacturer-approved throttle body cleaner if mechanical sticking is present.
- After cleaning, repeat actuator/scan tests. If the throttle now moves correctly, perform the recommended throttle adaptation/relearn procedure per manufacturer instructions.
- If actuator still fails or current draw is abnormal, replace the throttle body assembly (or throttle module) and repeat adaptation/relearn.
- If replacement does not clear the issue, inspect/repair wiring harness power and ground feeds and re-check ECU communication. Consider ECU or throttle control module fault if wiring is confirmed good.
- Clear codes and road-test. Verify no recurrence and that adaptation values are within spec.
Likely causes
- Throttle body is dirty/sticking (carbon deposits) restricting motor recovery
- Intermittent wiring/connector fault at the throttle body (corrosion, broken wire)
- Throttle actuator motor failure or internal throttle module electronics fault
- Low system voltage during recovery (weak battery, bad alternator output, poor ground)
- Incorrect or out-of-range pedal position sensor input causing control mismatch
Fault status
Status
Throttle actuator did not complete the commanded recovery/movement. MIL set. Engine may run in reduced power mode until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
Similar codes
Repair manuals
Brands with available manuals
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Code
P1683
PLYMOUTH
P — Powertrain
Speed Control Power Relay Or Speed Control 12 Volt Driver Circuit Open Or Shorted
AI status
Completed
Completed
100%
Causes
- Carbon build-up or mechanical binding in the throttle body preventing free movement
- Faulty throttle actuator motor or internal throttle body electronics
- Damaged wiring, poor connector contact or corroded terminals to throttle body
- Low battery voltage or poor ground affecting actuator operation
- Faulty accelerator pedal position sensor(s) or signal mismatch
- ECU or throttle control module software/firmware error or need for adaptation/relearn
Symptoms
- MIL (Malfunction Indicator Lamp) illuminated
- Reduced engine power / limp-mode activation
- Erratic or high/low idle
- Poor throttle response, hesitation or inability to accelerate normally
- Possible trouble starting if throttle cannot achieve required position
What to check
- Read stored/active DTCs and freeze frame data with an appropriate scan tool
- Check battery voltage and charging system at rest and under cranking (should be >12.0–12.5 V nominal)
- Visually inspect throttle body connector and wiring for damage, corrosion, or loose pins
- Inspect throttle body for carbon build-up or mechanical obstruction
- Compare accelerator pedal sensor signals and throttle position using the scan tool
- Perform an actuator test (commanded open/close) and observe target vs actual throttle angle
Signal parameters
- Battery/ignition supply voltage to throttle body (V)
- Actual throttle angle/position (%) or degrees
- Target throttle angle/position commanded by ECU
- Throttle actuator motor current (A) or motor drive feedback if available
- Accelerator Pedal Position Sensor 1 and 2 voltages/percent
- CAN/serial communication status between throttle module and ECU (if applicable)
Diagnostic algorithm
- Connect a full-function diagnostic scanner. Record the DTC, freeze frame and any related codes.
- Verify battery and charging system condition. Recharge or replace a weak battery before further testing.
- Visually inspect wiring and connectors at the throttle body and ECU. Repair any damaged wires or poor connections.
- With ignition on, monitor pedal position sensors and throttle position (target vs actual) while gently actuating the pedal. Look for inconsistencies or no movement.
- Command the throttle actuator using the scan tool (actuator test). Observe actual throttle movement and listen for unusual noises. If it fails to follow commands or binds, remove the throttle body for inspection.
- Remove and inspect the throttle body for carbon buildup, sticking plates, or debris. Clean using manufacturer-approved throttle body cleaner if mechanical sticking is present.
- After cleaning, repeat actuator/scan tests. If the throttle now moves correctly, perform the recommended throttle adaptation/relearn procedure per manufacturer instructions.
- If actuator still fails or current draw is abnormal, replace the throttle body assembly (or throttle module) and repeat adaptation/relearn.
- If replacement does not clear the issue, inspect/repair wiring harness power and ground feeds and re-check ECU communication. Consider ECU or throttle control module fault if wiring is confirmed good.
- Clear codes and road-test. Verify no recurrence and that adaptation values are within spec.
Likely causes
- Throttle body is dirty/sticking (carbon deposits) restricting motor recovery
- Intermittent wiring/connector fault at the throttle body (corrosion, broken wire)
- Throttle actuator motor failure or internal throttle module electronics fault
- Low system voltage during recovery (weak battery, bad alternator output, poor ground)
- Incorrect or out-of-range pedal position sensor input causing control mismatch
Fault status
Status
Throttle actuator did not complete the commanded recovery/movement. MIL set. Engine may run in reduced power mode until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
Similar codes
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Code
P1683
PONTIAC
P — Powertrain
Speed Control Power Relay Or Speed Control 12 Volt Driver Circuit Open Or Shorted
AI status
Completed
Completed
100%
Causes
- Carbon build-up or mechanical binding in the throttle body preventing free movement
- Faulty throttle actuator motor or internal throttle body electronics
- Damaged wiring, poor connector contact or corroded terminals to throttle body
- Low battery voltage or poor ground affecting actuator operation
- Faulty accelerator pedal position sensor(s) or signal mismatch
- ECU or throttle control module software/firmware error or need for adaptation/relearn
Symptoms
- MIL (Malfunction Indicator Lamp) illuminated
- Reduced engine power / limp-mode activation
- Erratic or high/low idle
- Poor throttle response, hesitation or inability to accelerate normally
- Possible trouble starting if throttle cannot achieve required position
What to check
- Read stored/active DTCs and freeze frame data with an appropriate scan tool
- Check battery voltage and charging system at rest and under cranking (should be >12.0–12.5 V nominal)
- Visually inspect throttle body connector and wiring for damage, corrosion, or loose pins
- Inspect throttle body for carbon build-up or mechanical obstruction
- Compare accelerator pedal sensor signals and throttle position using the scan tool
- Perform an actuator test (commanded open/close) and observe target vs actual throttle angle
Signal parameters
- Battery/ignition supply voltage to throttle body (V)
- Actual throttle angle/position (%) or degrees
- Target throttle angle/position commanded by ECU
- Throttle actuator motor current (A) or motor drive feedback if available
- Accelerator Pedal Position Sensor 1 and 2 voltages/percent
- CAN/serial communication status between throttle module and ECU (if applicable)
Diagnostic algorithm
- Connect a full-function diagnostic scanner. Record the DTC, freeze frame and any related codes.
- Verify battery and charging system condition. Recharge or replace a weak battery before further testing.
- Visually inspect wiring and connectors at the throttle body and ECU. Repair any damaged wires or poor connections.
- With ignition on, monitor pedal position sensors and throttle position (target vs actual) while gently actuating the pedal. Look for inconsistencies or no movement.
- Command the throttle actuator using the scan tool (actuator test). Observe actual throttle movement and listen for unusual noises. If it fails to follow commands or binds, remove the throttle body for inspection.
- Remove and inspect the throttle body for carbon buildup, sticking plates, or debris. Clean using manufacturer-approved throttle body cleaner if mechanical sticking is present.
- After cleaning, repeat actuator/scan tests. If the throttle now moves correctly, perform the recommended throttle adaptation/relearn procedure per manufacturer instructions.
- If actuator still fails or current draw is abnormal, replace the throttle body assembly (or throttle module) and repeat adaptation/relearn.
- If replacement does not clear the issue, inspect/repair wiring harness power and ground feeds and re-check ECU communication. Consider ECU or throttle control module fault if wiring is confirmed good.
- Clear codes and road-test. Verify no recurrence and that adaptation values are within spec.
Likely causes
- Throttle body is dirty/sticking (carbon deposits) restricting motor recovery
- Intermittent wiring/connector fault at the throttle body (corrosion, broken wire)
- Throttle actuator motor failure or internal throttle module electronics fault
- Low system voltage during recovery (weak battery, bad alternator output, poor ground)
- Incorrect or out-of-range pedal position sensor input causing control mismatch
Fault status
Status
Throttle actuator did not complete the commanded recovery/movement. MIL set. Engine may run in reduced power mode until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
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Code
P1683
RAM
P — Powertrain
Speed control servo power control circuit
AI status
Completed
Completed
100%
Causes
- Carbon build-up or mechanical binding in the throttle body preventing free movement
- Faulty throttle actuator motor or internal throttle body electronics
- Damaged wiring, poor connector contact or corroded terminals to throttle body
- Low battery voltage or poor ground affecting actuator operation
- Faulty accelerator pedal position sensor(s) or signal mismatch
- ECU or throttle control module software/firmware error or need for adaptation/relearn
Symptoms
- MIL (Malfunction Indicator Lamp) illuminated
- Reduced engine power / limp-mode activation
- Erratic or high/low idle
- Poor throttle response, hesitation or inability to accelerate normally
- Possible trouble starting if throttle cannot achieve required position
What to check
- Read stored/active DTCs and freeze frame data with an appropriate scan tool
- Check battery voltage and charging system at rest and under cranking (should be >12.0–12.5 V nominal)
- Visually inspect throttle body connector and wiring for damage, corrosion, or loose pins
- Inspect throttle body for carbon build-up or mechanical obstruction
- Compare accelerator pedal sensor signals and throttle position using the scan tool
- Perform an actuator test (commanded open/close) and observe target vs actual throttle angle
Signal parameters
- Battery/ignition supply voltage to throttle body (V)
- Actual throttle angle/position (%) or degrees
- Target throttle angle/position commanded by ECU
- Throttle actuator motor current (A) or motor drive feedback if available
- Accelerator Pedal Position Sensor 1 and 2 voltages/percent
- CAN/serial communication status between throttle module and ECU (if applicable)
Diagnostic algorithm
- Connect a full-function diagnostic scanner. Record the DTC, freeze frame and any related codes.
- Verify battery and charging system condition. Recharge or replace a weak battery before further testing.
- Visually inspect wiring and connectors at the throttle body and ECU. Repair any damaged wires or poor connections.
- With ignition on, monitor pedal position sensors and throttle position (target vs actual) while gently actuating the pedal. Look for inconsistencies or no movement.
- Command the throttle actuator using the scan tool (actuator test). Observe actual throttle movement and listen for unusual noises. If it fails to follow commands or binds, remove the throttle body for inspection.
- Remove and inspect the throttle body for carbon buildup, sticking plates, or debris. Clean using manufacturer-approved throttle body cleaner if mechanical sticking is present.
- After cleaning, repeat actuator/scan tests. If the throttle now moves correctly, perform the recommended throttle adaptation/relearn procedure per manufacturer instructions.
- If actuator still fails or current draw is abnormal, replace the throttle body assembly (or throttle module) and repeat adaptation/relearn.
- If replacement does not clear the issue, inspect/repair wiring harness power and ground feeds and re-check ECU communication. Consider ECU or throttle control module fault if wiring is confirmed good.
- Clear codes and road-test. Verify no recurrence and that adaptation values are within spec.
Likely causes
- Throttle body is dirty/sticking (carbon deposits) restricting motor recovery
- Intermittent wiring/connector fault at the throttle body (corrosion, broken wire)
- Throttle actuator motor failure or internal throttle module electronics fault
- Low system voltage during recovery (weak battery, bad alternator output, poor ground)
- Incorrect or out-of-range pedal position sensor input causing control mismatch
Fault status
Status
Throttle actuator did not complete the commanded recovery/movement. MIL set. Engine may run in reduced power mode until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
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Code
P1683
SATURN
P — Powertrain
Driver 5 Line 3
AI status
Completed
Completed
100%
Causes
- Carbon build-up or mechanical binding in the throttle body preventing free movement
- Faulty throttle actuator motor or internal throttle body electronics
- Damaged wiring, poor connector contact or corroded terminals to throttle body
- Low battery voltage or poor ground affecting actuator operation
- Faulty accelerator pedal position sensor(s) or signal mismatch
- ECU or throttle control module software/firmware error or need for adaptation/relearn
Symptoms
- MIL (Malfunction Indicator Lamp) illuminated
- Reduced engine power / limp-mode activation
- Erratic or high/low idle
- Poor throttle response, hesitation or inability to accelerate normally
- Possible trouble starting if throttle cannot achieve required position
What to check
- Read stored/active DTCs and freeze frame data with an appropriate scan tool
- Check battery voltage and charging system at rest and under cranking (should be >12.0–12.5 V nominal)
- Visually inspect throttle body connector and wiring for damage, corrosion, or loose pins
- Inspect throttle body for carbon build-up or mechanical obstruction
- Compare accelerator pedal sensor signals and throttle position using the scan tool
- Perform an actuator test (commanded open/close) and observe target vs actual throttle angle
Signal parameters
- Battery/ignition supply voltage to throttle body (V)
- Actual throttle angle/position (%) or degrees
- Target throttle angle/position commanded by ECU
- Throttle actuator motor current (A) or motor drive feedback if available
- Accelerator Pedal Position Sensor 1 and 2 voltages/percent
- CAN/serial communication status between throttle module and ECU (if applicable)
Diagnostic algorithm
- Connect a full-function diagnostic scanner. Record the DTC, freeze frame and any related codes.
- Verify battery and charging system condition. Recharge or replace a weak battery before further testing.
- Visually inspect wiring and connectors at the throttle body and ECU. Repair any damaged wires or poor connections.
- With ignition on, monitor pedal position sensors and throttle position (target vs actual) while gently actuating the pedal. Look for inconsistencies or no movement.
- Command the throttle actuator using the scan tool (actuator test). Observe actual throttle movement and listen for unusual noises. If it fails to follow commands or binds, remove the throttle body for inspection.
- Remove and inspect the throttle body for carbon buildup, sticking plates, or debris. Clean using manufacturer-approved throttle body cleaner if mechanical sticking is present.
- After cleaning, repeat actuator/scan tests. If the throttle now moves correctly, perform the recommended throttle adaptation/relearn procedure per manufacturer instructions.
- If actuator still fails or current draw is abnormal, replace the throttle body assembly (or throttle module) and repeat adaptation/relearn.
- If replacement does not clear the issue, inspect/repair wiring harness power and ground feeds and re-check ECU communication. Consider ECU or throttle control module fault if wiring is confirmed good.
- Clear codes and road-test. Verify no recurrence and that adaptation values are within spec.
Likely causes
- Throttle body is dirty/sticking (carbon deposits) restricting motor recovery
- Intermittent wiring/connector fault at the throttle body (corrosion, broken wire)
- Throttle actuator motor failure or internal throttle module electronics fault
- Low system voltage during recovery (weak battery, bad alternator output, poor ground)
- Incorrect or out-of-range pedal position sensor input causing control mismatch
Fault status
Status
Throttle actuator did not complete the commanded recovery/movement. MIL set. Engine may run in reduced power mode until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1-3 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