Accelerator Pedal Position Sensor 1
Issue with the accelerator pedal position sensor signal.
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 has a sensor that tells the engine computer how far you're pressing the gas. If this sensor is faulty, the computer might not know how much power to give the engine.
What the computer is actually seeing
The engine control module (ECM) expects a voltage signal between 0.5V (pedal fully released) and 4.5V (pedal fully pressed).
What a healthy reading looks like
0.5V to 4.5V under normal operation depending on pedal position.
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 for obvious wiring issues: corroded connectors, frayed wires, and connections related to the accelerator pedal.
- 2Verify that the accelerator pedal moves freely without obstruction.
- 3Use a multimeter to measure the voltage at the accelerator pedal position sensor. Expect 0.5V with the pedal released and close to 4.5V when fully pressed.
- 4If the voltages are outside this range, replace the accelerator pedal position sensor.
- 5If the sensor voltage is correct but the code persists, check the ECM for faults.
Common causes
- Faulty accelerator pedal position sensor
- Dirty or corroded connections
- Wiring damage or shorts
- Faulty ECM
Typical repair cost
$150-$400
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not recommended to drive. Performance may be impaired.
Will this code go away by itself?
It may not, especially if the underlying issue isn't fixed.
Why does this code occur with an engine misfire code?
An accelerator issue can cause improper throttle response, leading to engine performance problems.
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