Code
P2106
Generic
P — Powertrain
Throttle Actuator Control System - Forced Limited Power
Views:
UK: 35
EN: 67
RU: 36
AI status
Completed
Completed
100%
Causes
- Throttle actuator (throttle body) failure or internal short
- Wiring harness damage, open or short to power/ground in throttle motor or sensor circuits
- Poor connector contact, corrosion or water intrusion at throttle/PCM connectors
- Accelerator pedal position (APP) sensor fault or wiring issue
- Low or unstable battery/charging system voltage
- PCM/software fault, corrupted calibration, or communications error (CAN)
Symptoms
- Reduced engine power / limited throttle response (limp mode)
- Check Engine Light / MIL illuminated, possibly with P2106 and related codes
- Vehicle won't accelerate beyond a reduced speed or rpm limit
- Hesitation or lack of throttle response when accelerator pressed
- Engine may run roughly under acceleration or refuse to respond to pedal input
What to check
- Retrieve all stored and pending DTCs and freeze-frame data with a scan tool
- Check vehicle battery and charging system voltage (key on, engine off and running)
- Compare APP (accelerator pedal position) vs TPS (throttle position) live data for correlation
- Use bi-directional scan tool to command throttle actuator and watch response
- Visually inspect throttle body connector and wiring for damage, corrosion, or water intrusion
- Inspect harness grounds near engine and PCM for security and cleanliness
Signal parameters
- Battery voltage (key on engine off and running) — nominal 12.0–14.5 V
- Accelerator pedal position (%) — should vary smoothly 0–100% with pedal travel
- Throttle plate position / Throttle position sensor (TPS) (%) — should correlate with APP; no large lag or mismatch
- Throttle actuator/drive motor current (A) — nominal depends on vehicle; abnormal high or low current indicates motor or short
- Throttle motor duty cycle or command (%) from PCM — used during actuator tests
- Engine RPM — used to observe limp mode behavior
Diagnostic algorithm
- Connect a professional scan tool; record P2106 and any related codes (e.g., APP, TPS, CAN faults) plus freeze-frame data.
- Verify battery and charging system voltage. Low voltage can cause actuator faults; repair charging/battery as needed.
- Inspect throttle body connector and wiring for damage, corrosion, or loose pins. Wiggle test while monitoring live data for intermittent faults.
- Compare APP vs TPS live values across pedal travel. If APP input is good but TPS doesn't follow, suspect throttle actuator or wiring to TPS.
- Use scan tool to perform an actuator/motor command test (if available) and observe throttle plate movement and motor current draw.
- Measure continuity and resistance of throttle motor and sensor circuits to PCM per manufacturer specs. Check for short to power/ground.
- Check engine grounds and harness in area for corrosion or high resistance.
- Clean throttle plate if mechanical sticking or heavy carbon is present, then re-test.
- If wiring and mechanical checks are good and actuator fails bench or scan-tool tests, replace throttle body assembly.
- After repair, clear codes and perform a relearn/adaptation procedure for throttle/APP per manufacturer. Re-check for stored codes and road-test to verify.
- If faults persist with correct hardware, consider PCM software update or PCM replacement as a last step, and re-check communications on CAN bus.
Likely causes
- Shorted or high-resistance throttle motor winding
- Broken or frayed wiring on throttle body harness
- Contaminated or corroded connector pins at throttle body
- Failed APP sensor producing implausible input vs TPS
- Weak battery or poor ground causing actuator undervoltage
- Throttle body carbon buildup preventing full travel
Fault status
Status
PCM detected a throttle actuator control fault and has limited engine power (limp mode) to protect the drivetrain. Throttle response is reduced until the underlying fault is corrected.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
P2106
LAND ROVER
P — Powertrain
Throttle Actuator Control System - Limited Power
Views:
UK: 26
EN: 43
RU: 26
AI status
Completed
Completed
100%
Causes
- Throttle actuator (throttle body) failure or internal short
- Wiring harness damage, open or short to power/ground in throttle motor or sensor circuits
- Poor connector contact, corrosion or water intrusion at throttle/PCM connectors
- Accelerator pedal position (APP) sensor fault or wiring issue
- Low or unstable battery/charging system voltage
- PCM/software fault, corrupted calibration, or communications error (CAN)
Symptoms
- Reduced engine power / limited throttle response (limp mode)
- Check Engine Light / MIL illuminated, possibly with P2106 and related codes
- Vehicle won't accelerate beyond a reduced speed or rpm limit
- Hesitation or lack of throttle response when accelerator pressed
- Engine may run roughly under acceleration or refuse to respond to pedal input
What to check
- Retrieve all stored and pending DTCs and freeze-frame data with a scan tool
- Check vehicle battery and charging system voltage (key on, engine off and running)
- Compare APP (accelerator pedal position) vs TPS (throttle position) live data for correlation
- Use bi-directional scan tool to command throttle actuator and watch response
- Visually inspect throttle body connector and wiring for damage, corrosion, or water intrusion
- Inspect harness grounds near engine and PCM for security and cleanliness
Signal parameters
- Battery voltage (key on engine off and running) — nominal 12.0–14.5 V
- Accelerator pedal position (%) — should vary smoothly 0–100% with pedal travel
- Throttle plate position / Throttle position sensor (TPS) (%) — should correlate with APP; no large lag or mismatch
- Throttle actuator/drive motor current (A) — nominal depends on vehicle; abnormal high or low current indicates motor or short
- Throttle motor duty cycle or command (%) from PCM — used during actuator tests
- Engine RPM — used to observe limp mode behavior
Diagnostic algorithm
- Connect a professional scan tool; record P2106 and any related codes (e.g., APP, TPS, CAN faults) plus freeze-frame data.
- Verify battery and charging system voltage. Low voltage can cause actuator faults; repair charging/battery as needed.
- Inspect throttle body connector and wiring for damage, corrosion, or loose pins. Wiggle test while monitoring live data for intermittent faults.
- Compare APP vs TPS live values across pedal travel. If APP input is good but TPS doesn't follow, suspect throttle actuator or wiring to TPS.
- Use scan tool to perform an actuator/motor command test (if available) and observe throttle plate movement and motor current draw.
- Measure continuity and resistance of throttle motor and sensor circuits to PCM per manufacturer specs. Check for short to power/ground.
- Check engine grounds and harness in area for corrosion or high resistance.
- Clean throttle plate if mechanical sticking or heavy carbon is present, then re-test.
- If wiring and mechanical checks are good and actuator fails bench or scan-tool tests, replace throttle body assembly.
- After repair, clear codes and perform a relearn/adaptation procedure for throttle/APP per manufacturer. Re-check for stored codes and road-test to verify.
- If faults persist with correct hardware, consider PCM software update or PCM replacement as a last step, and re-check communications on CAN bus.
Likely causes
- Shorted or high-resistance throttle motor winding
- Broken or frayed wiring on throttle body harness
- Contaminated or corroded connector pins at throttle body
- Failed APP sensor producing implausible input vs TPS
- Weak battery or poor ground causing actuator undervoltage
- Throttle body carbon buildup preventing full travel
Fault status
Status
PCM detected a throttle actuator control fault and has limited engine power (limp mode) to protect the drivetrain. Throttle response is reduced until the underlying fault is corrected.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 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