WOMS
C code chassis Medium severity

C1135 Gear Shift position short to battery

The OBD2 code C1135 indicates that there is a short circuit in the gear shift position sensor circuit, causing it to read as if it is continuously connected to the battery

Definition

The OBD2 code C1135 indicates that there is a short circuit in the gear shift position sensor circuit, causing it to read as if it is continuously connected to the battery

Common causes

  • Faulty gear shift position sensor
  • Short circuit in wiring harness
  • Corroded or damaged connectors
  • Malfunctioning transmission control module (TCM)
  • Improperly installed or damaged gear shift assembly
  • Electrical interference from other components
  • Grounding issues in the electrical system

Common misdiagnoses

  • Faulty transmission range sensor
  • Defective gear shift lever assembly
  • Wiring issues or shorts in the harness
  • Malfunctioning body control module (BCM)
  • Issues with the powertrain control module (PCM)
  • Faulty neutral safety switch
  • Incorrectly installed or damaged transmission components

Troubleshooting steps

  1. 1. Check the Vehicle's Battery and Charging System

    Ensure the battery is in good condition and fully charged

  2. 2. Inspect the alternator and charging system for proper operation

  3. 3. Inspect Wiring and Connectors

    Visually inspect the wiring harness and connectors associated with the gear shift position sensor

  4. 4. Look for signs of damage, such as frayed wires, corrosion, or loose connections

  5. 5. Pay special attention to areas where the wiring may be exposed to heat or moving parts

  6. 6. Test the Gear Shift Position Sensor

    Use a multimeter to test the resistance and voltage output of the gear shift position sensor

  7. 7. Compare the readings to the manufacturer's specifications

  8. 8. If the sensor is faulty, it may need to be replaced

  9. 9. Check for Short Circuits

    Use a multimeter to check for shorts in the wiring harness

  10. 10. Disconnect the gear shift position sensor and check for continuity between the sensor wires and ground

  11. 11. If a short is found, trace the wiring to locate the source of the short

  12. 12. Inspect the Transmission Control Module (TCM)

    Check for any fault codes in the TCM that may provide additional information

  13. 13. Ensure that the TCM is functioning correctly and that there are no issues with its connections

  14. 14. Clear the Codes and Test Drive

    After performing repairs, clear the OBD-II codes using a scan tool

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

  16. 16. Consult Technical Service Bulletins (TSBs)

    Check for any TSBs related to the C1135 code for your specific vehicle make and model. Manufacturers may have known issues and recommended fixes

  17. 17. Seek Professional Help

    If the issue persists after performing the above steps, consider consulting a professional mechanic or technician who has experience with your vehicle's make and model.Additional Tips: - Always refer to the vehicle's service manual for specific diagnostic procedures and specifications. - Ensure that you have the proper tools and safety equipment when working on the vehicle. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the C1135 code