Accelerator Pedal Position Sensor 1
The accelerator pedal position sensor is sending a fault signal to the ECM.
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)
This code means the sensor that tracks how much you're pressing the gas pedal is acting up, making the computer confused about how much power you want.
What the computer is actually seeing
The Engine Control Module (ECM) expects a voltage signal from the accelerator pedal position sensor between 0.5V (pedal not pressed) to 4.5V (pedal fully pressed).
What a healthy reading looks like
0.5V to 4.5V for normal operation.
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.
- 11. Inspect the accelerator pedal assembly for any physical damage or binding.
- 22. Check the wiring and connectors related to the accelerator pedal position sensor for corrosion, breaks, or shorts.
- 33. Using a multimeter, measure the voltage at the sensor connector while pressing the pedal; it should range from 0.5V to 4.5V smoothly.
- 44. If voltage is outside this range, replace the accelerator pedal position sensor.
- 55. If the wiring and sensor check out but the code persists, check the ECM for faults.
Common causes
- Faulty accelerator pedal position sensor
- Wiring issues such as shorts or opens in the harness
- Bad ECM connection or fault
- Mechanical binding in the accelerator pedal assembly
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It can be drivable, but you may experience reduced throttle response or stalling.
Will this code come back after clearing?
It may come back if the underlying issue isn't fixed.
Can this issue be related to other problems?
Yes, wiring issues can affect other sensors and performance.
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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