WOMS
B code body Medium severity

B2136 Park Brake Applied Warning Lamp Circuit Short To Battery

The OBD2 code B2136 indicates a short circuit in the park brake applied warning lamp circuit, meaning the circuit is receiving power directly from the battery instead of functioning normally

Definition

The OBD2 code B2136 indicates a short circuit in the park brake applied warning lamp circuit, meaning the circuit is receiving power directly from the battery instead of functioning normally

Common causes

  • Shorted wiring or connectors
  • Faulty park brake switch
  • Damaged or corroded connectors
  • Malfunctioning warning lamp circuit
  • Grounding issues
  • Faulty body control module (BCM)

Common misdiagnoses

  • Faulty park brake switch
  • Shorted wiring or connectors
  • Defective instrument cluster
  • Malfunctioning body control module (BCM)
  • Incorrectly installed or damaged park brake assembly
  • Faulty ground connections
  • Issues with the ABS module
  • Battery or charging system problems

Troubleshooting steps

  1. 1. Understand the Code

    The B2136 code typically indicates that the park brake applied warning lamp circuit is shorted to battery voltage. This means that the circuit is receiving a constant voltage signal, which could be due to a wiring issue or a faulty component

  2. 2. Visual Inspection

    Check Wiring and Connectors: Inspect the wiring harness and connectors related to the park brake warning lamp circuit for any signs of damage, corrosion, or loose connections

  3. 3. Look for Shorts

    Check for any exposed wires that may be touching the chassis or other components, which could cause a short to battery

  4. 4. Check the Park Brake Switch

    Functionality Test: Test the park brake switch to ensure it is functioning correctly. If the switch is stuck in the "on" position, it may cause the warning lamp to illuminate

  5. 5. Continuity Test

    Use a multimeter to check for continuity in the switch when it is engaged and disengaged

  6. 6. Inspect the Warning Lamp Circuit

    Test the Warning Lamp: Check the park brake warning lamp itself to ensure it is not shorted. You can do this by removing the lamp and testing for continuity

  7. 7. Check for Ground

    Ensure that the circuit has a proper ground connection. A poor ground can cause erratic behavior in the circuit

  8. 8. Use a Multimeter

    Voltage Test: With the ignition on, use a multimeter to measure the voltage at the park brake warning lamp circuit. If you see battery voltage when the park brake is not applied, there may be a short in the circuit

  9. 9. Resistance Test

    Check the resistance in the circuit to identify any potential shorts

  10. 10. Check for Faulty Components

    Inspect Related Modules: If applicable, check the vehicle’s body control module (BCM) or any other related control modules for faults or issues

  11. 11. Replace Faulty Parts

    If you identify any faulty components (like the park brake switch or the warning lamp), replace them as necessary

  12. 12. Clear the Code and Test Drive

    After performing the above checks and repairs, clear the DTC using an OBD-II scanner

  13. 13. Take the vehicle for a test drive to see if the code reappears. Monitor the park brake warning lamp to ensure it operates correctly

  14. 14. Seek Professional Help

    If you are unable to resolve the issue after following these steps, it may be best to consult a professional mechanic or technician who has experience with your specific vehicle make and model. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the B2136 code