Accelerator Pedal Position Sensor 2 Performance
This code indicates an issue with the performance of the accelerator pedal position sensor 2.
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 computer is reading the signal from the second accelerator pedal sensor, which should send a voltage between 0.5V (fully off) and 4.5V (fully pressed). If the signal is outside this range or inconsistent with the main sensor, you'll get this code.
What the computer is actually seeing
The ECM expects the position of the accelerator pedal 2 to change smoothly across a voltage range of 0.5 to 4.5 volts. If it sees a voltage drop below 0.3V or above 4.7V, or if the signal doesn’t match the primary sensor, it triggers the fault code.
What a healthy reading looks like
0.5V to 4.5V for closed to full throttle position; should match main accelerator pedal sensor within 0.5V.
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 wiring and connectors for the accelerator pedal position sensor 2 for damage or corrosion.
- 2Measure the voltage at the sensor connector while depressing the pedal. If it's outside 0.5V to 4.5V, replace the sensor.
- 3Compare the voltage of pedal position sensor 1 with sensor 2. If they differ by more than 0.5V, suspect a fault in sensor 2.
- 4Check the throttle body for mechanical binding or obstruction that could affect sensor readings.
Common causes
- Faulty accelerator pedal position sensor 2
- Wiring issues or poor connections between the sensor and the ECM
- Faulty ECM
- Mechanical binding in the pedal assembly
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It depends on the symptoms. If the vehicle runs well and has no noticeable throttle response issues, you may drive it but should get it checked soon.
Will this code come back after clearing it?
If the underlying problem is not fixed, yes, it will likely return.
Why does this code relate to pedal sensor 2 and not the main sensor?
The ECM uses multiple sensors for safety and redundancy. This code indicates that the secondary sensor isn’t reporting correctly.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →