WOMS
P code powertrain Medium severity

P0930 Gear Shift Lock Solenoid Circuit Low

The OBD2 code P0930 indicates a low voltage or malfunction in the gear shift lock solenoid circuit, which is responsible for preventing the gear shift from being moved out of the park position without pressing the brake...

Definition

The OBD2 code P0930 indicates a low voltage or malfunction in the gear shift lock solenoid circuit, which is responsible for preventing the gear shift from being moved out of the park position without pressing the brake pedal

Common causes

  • Faulty gear shift lock solenoid
  • Damaged wiring or connectors
  • Poor ground connection
  • Blown fuse
  • Malfunctioning transmission control module (TCM)
  • Low transmission fluid level
  • Faulty brake switch

Common misdiagnoses

  • Faulty transmission control module (TCM)
  • Defective gear shift lock solenoid
  • Wiring issues or shorts in the circuit
  • Malfunctioning brake light switch
  • Transmission fluid issues
  • Faulty ignition switch
  • Problems with the vehicle's body control module (BCM)

Troubleshooting steps

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

    Ensure the battery is fully charged and in good condition

  2. 2. Check the alternator output to ensure it is providing adequate voltage

  3. 3. Inspect Fuses

    Locate and inspect the fuse associated with the gear shift lock solenoid circuit. Replace any blown fuses

  4. 4. Visual Inspection of Wiring and Connectors

    Inspect the wiring harness and connectors related to the gear shift lock solenoid for any signs of damage, corrosion, or loose connections

  5. 5. Repair or replace any damaged wiring or connectors

  6. 6. Test the Gear Shift Lock Solenoid

    Use a multimeter to test the resistance of the gear shift lock solenoid. Compare the readings to the manufacturer's specifications

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

  8. 8. Check for Ground Issues

    Ensure that the ground connection for the gear shift lock solenoid is secure and free of corrosion

  9. 9. Test the ground circuit with a multimeter to ensure proper continuity

  10. 10. Scan for Additional Codes

    Use an OBD-II scanner to check for any additional trouble codes that may provide more context to the issue

  11. 11. Address any other codes that may be present

  12. 12. Inspect the Brake Light Switch

    The gear shift lock solenoid often relies on the brake light switch to function properly. Check the brake light switch for proper operation and adjustment

  13. 13. Ensure that the brake lights illuminate when the brake pedal is pressed

  14. 14. Check for Software Updates

    In some cases, a software update may be available for the vehicle's engine control module (ECM) that addresses known issues related to the gear shift lock solenoid

  15. 15. Consult the Service Manual

    Refer to the vehicle's service manual for specific diagnostic procedures and specifications related to the gear shift lock solenoid circuit

  16. 16. Professional Diagnosis

    If the issue persists after performing the above steps, consider seeking assistance from a qualified mechanic or automotive technician who can perform more advanced diagnostics. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the P0930 code