Accelerator Pedal Position Sensor 2 - Voltage Above Normal
The second accelerator pedal position sensor is out of range.
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)
Your truck has two sensors to tell how far you're pushing the accelerator pedal. This code means the second sensor is sending a voltage signal that's too high, which can cause erratic throttle response.
What the computer is actually seeing
The engine control module (ECM) expects the second pedal sensor signal to be between 0.5V (fully released) and 4.5V (fully pressed). A voltage above 4.5V triggers this code.
What a healthy reading looks like
0.5V to 4.5V for the second pedal position sensor under 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 wiring harness and connectors for damage or corrosion. Repair or replace as needed. Decision point: If wiring and connectors are good, proceed to step 2. If damaged, fix before testing the sensor.
- 22. Check the voltage at the accelerator pedal position sensor 2 while moving the pedal from idle to full throttle. Decision point: If voltage remains above 4.5V at any point, replace the sensor. If voltage is within range, proceed to step 3.
- 33. Monitor the engine control module data for the accelerator pedal position sensor 2 while driving. Decision point: If the code returns, check for ECM updates or replace the ECM if software is current.
Common causes
- Wiring issues to the sensor
- Faulty accelerator pedal position sensor 2
- ECM software malfunction
- Poor ground connection to the sensor
Typical repair cost
$$
Related codes
Frequently asked questions
Can I still drive the vehicle?
Yes, but throttle response may be erratic. It's best to fix it soon.
Will this code come back after clearing it?
If the issue isn't resolved and the sensor remains faulty or there's a wiring problem, it will likely return.
Why does this code appear with SPN 3541?
SPN 3541 indicates the first accelerator pedal position sensor. Having both codes suggests issues with both sensors or the wiring between them.
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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