Accelerator Pedal Position Sensor Performance Issue
This code indicates a problem with the accelerator pedal position sensor performance.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The accelerator pedal position sensor helps the engine control module know how much you’re pushing on the gas pedal. If it’s not working correctly, the computer can’t get the right information about your speed up, which may affect engine power and drivability.
What the computer is actually seeing
The Engine Control Module (ECM) compares the signal from the accelerator pedal position sensor to expected values. If the signal deviates too much, or if the response time is slower than 100 milliseconds, it logs this code.
What a healthy reading looks like
The voltage from the accelerator pedal position sensor should vary between 0.5 volts (full closed) and 4.5 volts (full open) during operation. The expected response time should be under 100 milliseconds.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Check the accelerator pedal position sensor wiring for damage or corrosion.
- 2Check the connectors to ensure they are secure and free of dirt or corrosion. If any issues, repair before moving on.
- 3Use a scan tool to monitor the pedal position sensor voltage while moving the pedal. It should smoothly change from 0.5 V to 4.5 V—replace if it doesn't. Decision: If voltage changes correctly, inspect ECM. If there’s a fault, replace the sensor.
- 4Check the response time of the sensor using live data. It should be under 100 milliseconds. If it’s slower, consider replacing the sensor.
Common causes
- Faulty accelerator pedal position sensor
- Wiring issues (shorts or opens) in the signal circuit
- Corroded or loose connectors at the sensor
- Calibration issue after a service or repair
- Faulty engine control module (ECM)
Typical repair cost
$$
Related codes
Frequently asked questions
Can I still drive with this code?
Yes, it's drivable but may affect performance and responsiveness. Fix it soon to avoid damage.
Will this code come back after clearing it?
If the underlying issue isn’t fixed, then yes, it will likely return.
Why does this code pair with other codes?
It's common for multiple codes to appear if different systems share components or wiring in the vehicle.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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