Throttle/Pedal Position Sensor "F" Maximum Stop Performance
P2168 indicates that the throttle or pedal position sensor F is reading at or near its maximum voltage threshold, suggesting a sensor malfunction or wiring issue. This can render the vehicle undriveable and prevent proper engine control, making it unsafe to operate.
What You Might Notice
- Lack of throttle response
- Limited or no acceleration
- Engine stall at idle
- Hesitation during acceleration
- Cruise control inoperative
Most Common Causes
- 1
Defective throttle/pedal position sensor
The sensor has failed internally or is stuck at maximum resistance, causing it to send an out-of-range signal to the PCM.
- 2
Wiring or connector issues
Corroded connectors, damaged wiring, or poor connections to the position sensor can cause voltage spikes that register as maximum signal.
- 3
PCM or control module fault
The powertrain control module may be misinterpreting sensor signals or have an internal failure affecting sensor circuit monitoring.
- 4
Throttle body mechanical failure
The throttle butterfly or pedal linkage may be stuck, preventing normal position range and causing sensor maximum reading.
How to Diagnose It
- 1
Check Defective throttle/pedal position sensor — The sensor has failed internally or is stuck at maximum resistance, causing it to send an out-of-range signal to the PCM.
- 2
Check Wiring or connector issues — Corroded connectors, damaged wiring, or poor connections to the position sensor can cause voltage spikes that register as maximum signal.
- 3
Check PCM or control module fault — The powertrain control module may be misinterpreting sensor signals or have an internal failure affecting sensor circuit monitoring.
- 4
Check Throttle body mechanical failure — The throttle butterfly or pedal linkage may be stuck, preventing normal position range and causing sensor maximum reading.
How to Fix It
- 1
Replace throttle/pedal position sensor
Remove and replace the faulty position sensor F with a new OEM or quality aftermarket unit, then clear the code and test drive.
- 2
Inspect and repair wiring and connectors
Check the sensor wiring harness and connector for corrosion, damage, or loose connections. Clean or replace as needed and ensure secure mating.
- 3
Clean or replace throttle body
Remove carbon buildup or debris from the throttle body and inspect the butterfly mechanism for mechanical binding or sticking.
- 4
Reprogram or replace PCM
If sensor and wiring are confirmed good, the PCM may need reprogramming or replacement to resolve the fault.
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