WOMS
C code chassis High severity

C0357 Park Switch Circuit High

The OBD2 code C0357 indicates a malfunction in the park switch circuit, specifically that the circuit is reading a high voltage when it should not be, which may affect the vehicle's transmission or related systems

Definition

The OBD2 code C0357 indicates a malfunction in the park switch circuit, specifically that the circuit is reading a high voltage when it should not be, which may affect the vehicle's transmission or related systems

Common causes

  • Faulty park switch
  • Wiring issues (shorts or open circuits)
  • Corroded connectors
  • Faulty transmission control module (TCM)
  • Malfunctioning body control module (BCM)
  • Poor ground connections
  • Electrical interference or noise

Common misdiagnoses

  • Faulty park switch
  • Wiring issues
  • Transmission control module failure
  • Faulty neutral safety switch
  • Malfunctioning brake light switch
  • Defective body control module
  • Incorrectly installed or damaged transmission
  • Electrical shorts or open circuits in related wiring

Troubleshooting steps

  1. 1. Check for Additional Codes

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

  2. 2. Inspect the Park/Neutral Position Switch

    Locate the park/neutral position switch (also known as the transmission range sensor) and inspect it for any visible damage, corrosion, or loose connections

  3. 3. Ensure that the switch is properly aligned and functioning as intended

  4. 4. Check Wiring and Connectors

    Inspect the wiring harness and connectors associated with the park switch circuit for any signs of damage, fraying, or corrosion

  5. 5. Look for any short circuits or open circuits in the wiring that could cause a high voltage reading

  6. 6. Test the Park/Neutral Position Switch

    Use a multimeter to test the resistance and continuity of the park/neutral position switch. Refer to the vehicle's service manual for the specific resistance values and testing procedures

  7. 7. If the switch is faulty, it may need to be replaced

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

    Check the TCM for any faults or issues. A malfunctioning TCM can sometimes cause incorrect readings from the park switch circuit

  9. 9. Ensure that the TCM is receiving proper power and ground

  10. 10. Check for Ground Issues

    Ensure that the ground connections for the park switch circuit are secure and free of corrosion. A poor ground can lead to erratic voltage readings

  11. 11. Look for Environmental Factors

    Sometimes, environmental factors such as moisture or dirt can affect the park switch circuit. Inspect the area for any signs of water intrusion or contamination

  12. 12. Clear Codes and Test Drive

    After performing the above checks and repairs, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns

  13. 13. Consult a Professional

    If the issue persists after performing these troubleshooting steps, it may be necessary to consult a professional mechanic or technician who has experience with your specific vehicle make and model. By following these steps, you should be able to identify and resolve the issue related to the C0357 code. Always refer to the vehicle's service manual for specific details and specifications related to your vehicle