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: Inspection
- 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 .
- HDS - Connect
1. Turn the vehicle to the ON mode. 2. Connect the HDS to the DLC (A) located under the driver's side of the dashboard.
3. Make sure the HDS communicates with the PCM and other vehicle systems. If it doesn't, go to the DLC circuit troubleshooting - Refer to: DLC Circuit Troubleshooting (2014 2015), or DLC Circuit Troubleshooting (2017 2018), or DLC Circuit Troubleshooting (2017 2018), or DLC Circuit Troubleshooting (2019 2020), or DLC Circuit Troubleshooting(Without CAN Gateway) (2016), or DLC Circuit Troubleshooting(With CAN Gateway) (2016)
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- 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 if it does not have the latest software , or substitute a known-good PCM - Refer to: PCM Removal and Installation (2016 2017 2018 2019 2020) or PCM Removal and Installation (2014 2015) , 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 , then go to step 1.
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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.