Accelerator Pedal Position Sensor 2 Signal Above Normal Operating Range
The second accelerator pedal position sensor is sending a signal that's too high.
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)
There are usually two sensors on the accelerator pedal. This code means the second one is saying the pedal is pushed further than it's designed to, which can confuse the engine computer about how hard you're pressing the gas.
What the computer is actually seeing
The engine control module (ECM) expects a voltage between 0.5V and 4.5V from the accelerator pedal sensors. If sensor 2 provides a voltage above 4.5V for more than 2 seconds, this code triggers.
What a healthy reading looks like
Expected voltage from accelerator pedal position sensor 2 is between 0.5V and 4.5V; anything above 4.5V is out of range.
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 wiring and connectors for the accelerator pedal position sensor 2 for damage or corrosion. Decision: If damage is found, repair and retest. If not, proceed to step 2.
- 22. Using a multimeter, measure the voltage at the connector for the accelerator pedal position sensor 2 while pressing the pedal. Decision: If voltage is above 4.5V, replace the accelerator pedal assembly. If not, proceed to step 3.
- 33. Check for updates or reprogramming needs in the ECM. Decision: If updates are available, perform the reprogramming. If not, inspect and test the first accelerator pedal position sensor for faults.
Common causes
- Faulty accelerator pedal position sensor 2
- Damaged wiring or connectors in the pedal circuit
- Improperly calibrated ECM
- Foreign objects obstructing the pedal movement
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not recommended to drive as the vehicle may not respond properly to your throttle input.
Will the code come back after clearing?
If the issue isn't fixed, the code will likely return after a short drive.
Why does this code sometimes pair with SPN 2901?
SPN 2901 indicates a similar problem but with the first pedal sensor, suggesting that both sensors could be faulty or have a shared connection issue.
Working a real vehicle right now?
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