Code
P2111
Generic
P — Powertrain
Throttle Actuator A Control System - Stuck Open
Views:
UK: 22
EN: 94
RU: 62
AI status
Completed
Completed
100%
Causes
- Throttle body or throttle plate mechanically binding (carbon build-up, foreign object, corrosion)
- Throttle actuator/motor failure or internal gear failure
- Throttle position sensor(s) (TPS) or potentiometer failure or poor calibration
- Wiring harness problems: open, short to power/ground, high resistance, corroded connector pins
- Poor ground or low battery/charging voltage during operation
- ECM/TCM or throttle control module fault
Symptoms
- Check Engine Light (CEL) with P2111 stored
- Reduced engine power / limp-home mode
- High or unsteady idle speed
- Delayed or no response to accelerator pedal input
- Engine may surge or stall when throttle is commanded closed
- Possible stored or simultaneous pedal position sensor codes
What to check
- Retrieve freeze frame and stored codes; note conditions when code set (RPM, load, temp, battery voltage)
- Visually inspect throttle body, actuator and wiring harness for damage, contamination, or foreign objects
- Scan real-time PIDs: commanded throttle position vs actual throttle position (TPS), accelerator pedal position sensors, throttle actuator command (percent/duty/current)
- Check battery voltage and charging system under load; low voltage can cause actuator faults
- Check connector pins for corrosion, bent pins, moisture, or poor mating
- Perform wiggle test on wiring harness while monitoring PIDs for intermittent faults
Signal parameters
- Commanded throttle plate position: 0–100% (idle ~5–10% closed depends on vehicle)
- Actual throttle plate position (TPS): 0.5–4.5 V or 0–100% position (should track commanded position within a few percent)
- Throttle actuator command: PWM duty 0–100% or percentage command from ECM (varies by maker)
- Throttle motor current: typically low to moderate (spec varies); excessive or zero current may indicate motor/gear issue
- Accelerator pedal sensor 1 & 2 voltages: ~0.5–4.5 V (two channels, must correlate and be within expected ratio)
- Battery voltage at idle/under cranking: typically 12–14.5 V (significantly lower may trigger faults)
Diagnostic algorithm
- Connect a capable scan tool; read and record all stored codes and freeze-frame data. Clear codes only after initial documentation.
- Verify battery state and charging system. If voltage
- Visually inspect throttle body and actuator for carbon build-up, debris, bent linkage or foreign objects. Manually operate throttle plate (engine off, ignition on, follow manufacturer procedure) to check for binding.
- With scan tool, monitor live data: commanded throttle position vs actual TPS position and accelerator pedal sensor values. Repeat pedal inputs and watch for mismatch or stuck actual position while commanded changes.
- Perform wiggle/cold flex testing of wiring and connectors while watching live PIDs for intermittent changes. Inspect connector pins for corrosion, bent or pushed-in pins, and repair as needed.
- Check resistance and continuity of actuator motor windings and TPS sensors per manufacturer spec. Measure motor current while commanding movement (service information required) — look for open, shorted coils or excessive current indicating mechanical bind.
- If mechanical contamination/binding is found, clean throttle body per service manual or replace assembly if worn/damaged. Relearn/throttle adaptation per manufacturer after cleaning or replacement.
- If wiring and mechanical tests are good but actuator does not move or current is abnormal, replace throttle actuator assembly (or motor/gearbox if serviceable) and retest.
- If actuator and wiring test good, suspect control module fault or software issue — check for TSBs and update/reflash ECM, or replace control module only after exhausting other causes.
- After repairs, clear codes and perform drive cycle and adaptation procedures; verify that commanded and actual throttle positions track and that P2111 does not return.
Likely causes
- Carbon build-up or mechanical binding at throttle plate
- Faulty throttle actuator motor or gearbox
- Wiring/connectors at throttle body (damaged, corroded, or intermittent)
Fault status
Status
Throttle actuator control stuck open: ECM commanded throttle closure but throttle did not achieve expected closed/position — possible mechanical binding, actuator or wiring fault.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
P2111
LAND ROVER
P — Powertrain
Throttle actuator control system - open
Views:
UK: 10
EN: 66
RU: 35
AI status
Completed
Completed
100%
Causes
- Throttle body or throttle plate mechanically binding (carbon build-up, foreign object, corrosion)
- Throttle actuator/motor failure or internal gear failure
- Throttle position sensor(s) (TPS) or potentiometer failure or poor calibration
- Wiring harness problems: open, short to power/ground, high resistance, corroded connector pins
- Poor ground or low battery/charging voltage during operation
- ECM/TCM or throttle control module fault
Symptoms
- Check Engine Light (CEL) with P2111 stored
- Reduced engine power / limp-home mode
- High or unsteady idle speed
- Delayed or no response to accelerator pedal input
- Engine may surge or stall when throttle is commanded closed
- Possible stored or simultaneous pedal position sensor codes
What to check
- Retrieve freeze frame and stored codes; note conditions when code set (RPM, load, temp, battery voltage)
- Visually inspect throttle body, actuator and wiring harness for damage, contamination, or foreign objects
- Scan real-time PIDs: commanded throttle position vs actual throttle position (TPS), accelerator pedal position sensors, throttle actuator command (percent/duty/current)
- Check battery voltage and charging system under load; low voltage can cause actuator faults
- Check connector pins for corrosion, bent pins, moisture, or poor mating
- Perform wiggle test on wiring harness while monitoring PIDs for intermittent faults
Signal parameters
- Commanded throttle plate position: 0–100% (idle ~5–10% closed depends on vehicle)
- Actual throttle plate position (TPS): 0.5–4.5 V or 0–100% position (should track commanded position within a few percent)
- Throttle actuator command: PWM duty 0–100% or percentage command from ECM (varies by maker)
- Throttle motor current: typically low to moderate (spec varies); excessive or zero current may indicate motor/gear issue
- Accelerator pedal sensor 1 & 2 voltages: ~0.5–4.5 V (two channels, must correlate and be within expected ratio)
- Battery voltage at idle/under cranking: typically 12–14.5 V (significantly lower may trigger faults)
Diagnostic algorithm
- Connect a capable scan tool; read and record all stored codes and freeze-frame data. Clear codes only after initial documentation.
- Verify battery state and charging system. If voltage
- Visually inspect throttle body and actuator for carbon build-up, debris, bent linkage or foreign objects. Manually operate throttle plate (engine off, ignition on, follow manufacturer procedure) to check for binding.
- With scan tool, monitor live data: commanded throttle position vs actual TPS position and accelerator pedal sensor values. Repeat pedal inputs and watch for mismatch or stuck actual position while commanded changes.
- Perform wiggle/cold flex testing of wiring and connectors while watching live PIDs for intermittent changes. Inspect connector pins for corrosion, bent or pushed-in pins, and repair as needed.
- Check resistance and continuity of actuator motor windings and TPS sensors per manufacturer spec. Measure motor current while commanding movement (service information required) — look for open, shorted coils or excessive current indicating mechanical bind.
- If mechanical contamination/binding is found, clean throttle body per service manual or replace assembly if worn/damaged. Relearn/throttle adaptation per manufacturer after cleaning or replacement.
- If wiring and mechanical tests are good but actuator does not move or current is abnormal, replace throttle actuator assembly (or motor/gearbox if serviceable) and retest.
- If actuator and wiring test good, suspect control module fault or software issue — check for TSBs and update/reflash ECM, or replace control module only after exhausting other causes.
- After repairs, clear codes and perform drive cycle and adaptation procedures; verify that commanded and actual throttle positions track and that P2111 does not return.
Likely causes
- Carbon build-up or mechanical binding at throttle plate
- Faulty throttle actuator motor or gearbox
- Wiring/connectors at throttle body (damaged, corroded, or intermittent)
Fault status
Status
Throttle actuator control stuck open: ECM commanded throttle closure but throttle did not achieve expected closed/position — possible mechanical binding, actuator or wiring fault.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop Manual199,00 UAH
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop Manual199,00 UAH
Land Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop Manual199,00 UAH
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
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