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P1135Pedal Position Sensor A Circuit Intermittent

The OBD2 code P1135 indicates an intermittent issue with the Pedal Position Sensor A circuit, which may affect the vehicle's throttle response and performance

Definition

The OBD2 code P1135 indicates an intermittent issue with the Pedal Position Sensor A circuit, which may affect the vehicle's throttle response and performance

Common causes

  • Faulty pedal position sensor
  • Poor electrical connections or wiring issues
  • Corroded connectors
  • Faulty engine control module (ECM)
  • Intermittent short circuits
  • Grounding issues
  • Mechanical binding in the accelerator pedal assembly

Common misdiagnoses

  • Throttle Position Sensor (TPS) issues
  • Accelerator Pedal Position Sensor failure
  • Engine Control Module (ECM) malfunction
  • Wiring or connector issues
  • Vacuum leaks
  • Fuel delivery problems
  • Mass Air Flow (MAF) sensor problems
  • Crankshaft or Camshaft Position Sensor issues
  • Transmission problems
  • Ignition system faults

Troubleshooting steps

  1. 1.Check for Additional Codes

    Before proceeding, check for any other related trouble codes that may provide more context to the issue

  2. 2.Inspect the Pedal Position Sensor

  3. 3.Locate the pedal position sensor and visually inspect it for any signs of damage, corrosion, or loose connections

  4. 4.Ensure that the sensor is securely mounted and that there are no obstructions affecting its operation

  5. 5.Check Wiring and Connectors

  6. 6.Inspect the wiring harness and connectors associated with the pedal position sensor for fraying, breaks, or corrosion

  7. 7.Ensure that all connectors are securely plugged in and that there are no bent pins

  8. 8.Test the Pedal Position Sensor

  9. 9.Use a multimeter to test the resistance and voltage output of the pedal position sensor according to the manufacturer's specifications

  10. 10.Check for proper voltage supply to the sensor and ensure that the output voltage changes smoothly as the pedal is pressed and released

  11. 11.Check for Ground Issues

  12. 12.Ensure that the ground connection for the pedal position sensor is secure and free of corrosion

  13. 13.Test the ground circuit with a multimeter to ensure it has a good connection

  14. 14.Inspect the Throttle Body

  15. 15.If applicable, check the throttle body for any issues, as the pedal position sensor is often linked to throttle control

  16. 16.Ensure that the throttle body is clean and functioning properly

  17. 17.Scan for Software Updates

  18. 18.Check if there are any software updates available for the vehicle’s engine control module (ECM) that may address known issues with the pedal position sensor

  19. 19.Clear the Codes and Test Drive

  20. 20.After performing the above checks and repairs, clear the trouble codes using an OBD-II scanner

  21. 21.Take the vehicle for a test drive to see if the code reappears

  22. 22.Consult Repair Manual

  23. 23.Refer to the vehicle’s service manual for specific diagnostic procedures and specifications related to the pedal position sensor

  24. 24.Seek Professional Help

  25. 25.If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or technician for further diagnosis. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the P1135 code