Accelerator Pedal Position Sensor 2 - Voltage Above Normal
The second accelerator pedal position sensor is reading a voltage that is higher than the normal 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)
Inside the truck's computer, it looks at two accelerator pedal position sensors for safety. When it sees that one sensor is sending a voltage above 4.5 volts, it triggers this code. Normally, these sensors should read between 0.5 to 4.5 volts depending on how far you press the pedal.
What the computer is actually seeing
The computer is looking for a voltage signal from both accelerator pedal position sensors. A normal signal range is between 0.5 volts (pedal released) and 4.5 volts (pedal fully pressed). If Sensor 2 reads more than 4.5 volts, it triggers the code.
What a healthy reading looks like
Voltage should range from 0.5V to 4.5V; over 4.5V triggers the fault.
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. Check the wiring and connectors to accelerator pedal position sensor 2 for damage or corrosion.
- 22. Measure the voltage at the sensor while pressing the pedal: Should be 0.5V to 4.5V. Is it over 4.5V? If yes, suspect a faulty sensor. If no, continue to step 3.
- 33. Check the ground and power supply to the sensor using a multimeter. Power should be around 5V. Is the power supply good? If yes, replace sensor 2. If not, repair the power supply circuit.
- 44. If sensor 2 is replaced and the code reappears, consider checking the ECM for updates or issues.
Common causes
- Faulty accelerator pedal position sensor 2
- Short circuit in sensor wiring
- Open circuit or bad ground connection in sensor circuit
- ECM/software issues
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best not to drive until you fix it. The vehicle may have reduced throttle response.
Will the code come back after clearing it?
If the root issue isn't fixed, yes, the code will likely return.
Why do both accelerator sensors matter?
They provide redundancy for safety. If one fails, the system can detect it and prevent issues.
Working a real vehicle right now?
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