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P code powertrain High severity

P2136 Throttle/Pedal Pos Sensor/Switch A / C Voltage Correlation

The OBD2 code P2136 indicates a correlation issue between the throttle position sensor and the accelerator pedal position sensor, suggesting that the signals from these sensors do not match as expected, which can affect...

Definition

The OBD2 code P2136 indicates a correlation issue between the throttle position sensor and the accelerator pedal position sensor, suggesting that the signals from these sensors do not match as expected, which can affect engine performance and throttle response

Common causes

  • Faulty throttle position sensor (TPS)
  • Faulty accelerator pedal position sensor (APP)
  • Wiring issues (shorts, opens, or corrosion)
  • Poor electrical connections
  • Faulty engine control module (ECM)
  • Mechanical issues with the throttle body
  • Calibration issues between TPS and APP sensors

Common misdiagnoses

  • Throttle body failure
  • Accelerator pedal position sensor failure
  • Wiring or connector issues
  • Engine control module (ECM) failure
  • Air intake issues
  • Vacuum leaks
  • Fuel system problems
  • Transmission issues

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other related trouble codes. This can provide more context and help identify if there are other issues present

  2. 2. Inspect Wiring and Connectors

    Visually inspect the wiring and connectors associated with the throttle position sensor and accelerator pedal position sensor. Look for

  3. 3. Damaged, frayed, or corroded wires

  4. 4. Loose or corroded connectors

  5. 5. Repair or replace any damaged components as necessary

  6. 6. Test the Throttle Position Sensor (TPS)

    Use a multimeter to test the TPS for proper voltage and resistance. Check the manufacturer's specifications for the correct values

  7. 7. Ensure that the TPS is functioning smoothly throughout its range of motion

  8. 8. Test the Accelerator Pedal Position Sensor (APP)

    Similarly, test the APP sensor using a multimeter. Verify that it provides the correct voltage and resistance readings according to the specifications

  9. 9. Check for smooth operation and ensure there are no binding or mechanical issues

  10. 10. Check for Mechanical Issues

    Inspect the throttle body for any obstructions, dirt, or carbon buildup that could affect its operation

  11. 11. Ensure that the throttle plate moves freely and is not sticking

  12. 12. Perform a Throttle Body Cleaning

    If there is carbon buildup, clean the throttle body using an appropriate cleaner. This can help restore proper function

  13. 13. Check for Software Updates

    Sometimes, manufacturers release software updates for the engine control module (ECM) that can resolve issues related to sensor calibration. Check with the dealership or manufacturer for any available updates

  14. 14. Clear Codes and Test Drive

    After performing repairs or adjustments, clear the trouble codes using the OBD-II scanner

  15. 15. Take the vehicle for a test drive to see if the code reappears. Monitor the vehicle's performance during the drive

  16. 16. Replace Faulty Components

    If the issue persists after all checks and repairs, consider replacing the throttle position sensor or accelerator pedal position sensor, as they may be faulty

  17. 17. Consult a Professional

    If you are unable to resolve the issue after following these steps, it may be best to consult a professional mechanic or technician who has experience with your specific vehicle make and model. By following these troubleshooting steps, you should be able to identify and resolve the issue associated with the P2136 code