Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
App Sensor Signal: Inspection
NOTE:
- This procedure checks the APP sensor in its fully closed position. In any other position, the APP sensor stores DTCs which are covered in other troubleshooting procedures.
- Check for Pending or Confirmed DTCs with the HDS before doing this procedure. If any DTCs are indicated, troubleshoot them first, then do this procedure.
- Press the accelerator pedal several times to check its operation. If it does not operate smoothly, check the pedal. If you find a problem, replace the Accelerator Pedal Module - Removal and Installation .
- HDS - Connect
- APP Sensor Signal - Inspect
1. Make sure the accelerator pedal is not pressed, then check the APP SENSOR in the DATA LIST with the HDS. - If it is 0 %, the APP sensor is OK.
- If it is not 0 %, update the PCM Update (if it does not have the latest software) or substitute a known-good PCM - Refer to:
PCM (6-Speed A/T), ('16-'18 9-Speed A/T) - Removal and Installation or
PCM (9-Speed A/T) - Removal and Installation (2019 2020 2021) then go to step 2..
2. Make sure the accelerator pedal is not pressed, then check the APP SENSOR in the DATA LIST with the HDS.
- If it is 0 %, the APP sensor is OK.
- If it is not 0 %, replace the Accelerator Pedal Module - Removal and Installation , then go to step 1.
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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