Description:

This diagnostic trouble code is triggered when the control unit detects a voltage exceeding 4.8 volts at the signal input for the park lock pressure sensor (B90), indicating a short to a supply lead somewhere in the circuit.

Reaction:

The park lock system may not function correctly, potentially leading to issues with the vehicle’s ability to remain securely parked.

Recommendations:

• Inspect Wiring and Connections:
  • Examine the wiring and connections to the B90 park lock pressure sensor for any damage, loose connections, or corrosion. Repair or replace as needed.
• Test the Sensor:
  • Verify the operation of the park lock pressure sensor. Replace if faulty.
• Check for Shorts:
  • Inspect the circuit for any shorts to a supply lead and address the issue.
• Secure Connections:
  • Ensure all connections are clean, secure, and free from contamination.

Note:

Regular inspections and maintenance of sensor circuits can prevent high voltage issues and ensure the reliable operation of safety-critical systems like the park lock mechanism.