Accelerator Pedal Position Sensor 2
Issues with the second accelerator pedal position sensor.
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 second pedal position sensor measures how far the accelerator pedal is pushed down. It sends this info to the engine control module (ECM) to adjust throttle control for better performance and emissions. If there's a problem with this sensor, the ECM may not know how much power to give the engine.
What the computer is actually seeing
The ECM expects a voltage between 0.5V to 4.5V from the accelerator pedal position sensor(s) based on position. If it sees voltage outside these ranges or a consistent fault (like a short or open), it triggers the SPN 0359 code.
What a healthy reading looks like
The expected voltage should be approximately 0.5V at idle and should increase linearly to around 4.5V when the pedal is fully depressed.
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 at the accelerator pedal position sensor 2 for damage or looseness. Repair as necessary. Decision Point: If wiring is good, go to Step 2. If damaged, repair or replace wiring.
- 22. Measure voltage at the accelerator pedal position sensor 2 while pressing the pedal. You should see a change from 0.5V to 4.5V. Decision Point: If the voltage is out of spec, replace the sensor. If voltage is normal, go to Step 3.
- 33. Check the pedal position sensor 1 for proper operation. If it is also faulty, both sensors may be compromised. Decision Point: If sensor 1 is fine, the issue is likely with the ECM.
Common causes
- Damaged wiring or connectors to the sensor
- Faulty accelerator pedal position sensor 2
- ECM software issues
- Poor ground connections
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable but you might experience reduced power or acceleration.
Will this code come back after clearing it?
If the problem isn't fixed, the code will likely return.
Why is this code often seen with SPN 0358?
SPN 0358 involves the first pedal position sensor, and if both sensors are failing, they often trigger codes together.
Working a real vehicle right now?
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