P1135: Pedal Position Sensor A Circuit Intermittent

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. Check for Additional Codes

Before proceeding, check for any other related trouble codes that may provide more context to the issue
2. Inspect the Pedal Position Sensor
3. Locate the pedal position sensor and visually inspect it for any signs of damage, corrosion, or loose connections
4. Ensure that the sensor is securely mounted and that there are no obstructions affecting its operation
5. Check Wiring and Connectors
6. Inspect the wiring harness and connectors associated with the pedal position sensor for fraying, breaks, or corrosion
7. Ensure that all connectors are securely plugged in and that there are no bent pins
8. Test the Pedal Position Sensor
9. Use a multimeter to test the resistance and voltage output of the pedal position sensor according to the manufacturer's specifications
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. Check for Ground Issues
12. Ensure that the ground connection for the pedal position sensor is secure and free of corrosion
13. Test the ground circuit with a multimeter to ensure it has a good connection
14. Inspect the Throttle Body
15. If applicable, check the throttle body for any issues, as the pedal position sensor is often linked to throttle control
16. Ensure that the throttle body is clean and functioning properly
17. Scan for Software Updates
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. Clear the Codes and Test Drive
20. After performing the above checks and repairs, clear the trouble codes using an OBD-II scanner
21. Take the vehicle for a test drive to see if the code reappears
22. Consult Repair Manual
23. Refer to the vehicle’s service manual for specific diagnostic procedures and specifications related to the pedal position sensor
24. Seek Professional Help
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

Definition

Common causes

Common misdiagnoses

Troubleshooting steps

1. Check for Additional Codes

2. Inspect the Pedal Position Sensor

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

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

5. Check Wiring and Connectors

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

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

8. Test the Pedal Position Sensor

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

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. Check for Ground Issues

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

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

14. Inspect the Throttle Body

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

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

17. Scan for Software Updates

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. Clear the Codes and Test Drive

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

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

22. Consult Repair Manual

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

24. Seek Professional Help

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