Description:

This diagnostic trouble code is triggered when the control unit detects a voltage of less than 0.3 volts at the signal input for the park lock pressure sensor (B90). This indicates that the circuit is shorted to ground or is open.

Reaction:

The park lock system may not function correctly, potentially compromising the vehicle’s ability to stay securely parked.

Recommendations:

• Inspect Wiring and Connections:
  • Check for any signs of damage, corrosion, or loose connections in the wiring to the B90 park lock pressure sensor. Repair or replace as necessary.
• Test the Sensor:
  • Verify the functionality of the B90 park lock pressure sensor. Replace if found to be faulty.
• Check for Shorts to Ground:
  • Inspect the circuit for any potential shorts to ground and rectify any issues found.
• Verify Power Supply:
  • Ensure that the power supply to the sensor is stable and within the specified voltage range.

Note:

Regular inspections and maintenance can prevent issues with low voltage in sensor circuits, ensuring the reliable operation of safety-critical systems like the park lock mechanism.