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B code body Medium severity

B1446 Wiper Park Sense Circuit Failure

The OBD2 code B1446 indicates a malfunction in the wiper park sense circuit, which is responsible for detecting the position of the windshield wipers when they are in the parked position

Definition

The OBD2 code B1446 indicates a malfunction in the wiper park sense circuit, which is responsible for detecting the position of the windshield wipers when they are in the parked position

Common causes

  • Faulty wiper motor
  • Damaged wiring or connectors
  • Failed wiper park switch
  • Malfunctioning body control module (BCM)
  • Corroded terminals
  • Short circuit in the wiper circuit
  • Poor ground connection

Common misdiagnoses

  • Faulty windshield wiper motor
  • Bad wiper switch
  • Wiring issues or shorts in the harness
  • Malfunctioning body control module (BCM)
  • Incorrectly installed or damaged wiper linkage
  • Issues with the wiper relay
  • Problems with the fuse related to the wiper system

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other related trouble codes. Sometimes, multiple codes can provide more context for the issue

  2. 2. Inspect the Wiper System

  3. 3. Wiper Motor

    Ensure that the wiper motor is functioning properly. Test the motor by activating the wipers and observing their operation

  4. 4. Wiper Linkage

    Check the wiper linkage for any signs of damage or disconnection. Ensure that the wipers are properly attached to the motor

  5. 5. Examine the Wiper Park Position Sensor

  6. 6. Locate the wiper park position sensor (if applicable) and inspect it for any physical damage or disconnection

  7. 7. Test the sensor for proper operation using a multimeter. Check for continuity and proper voltage as specified in the vehicle's service manual

  8. 8. Inspect Wiring and Connectors

  9. 9. Check the wiring harness and connectors associated with the wiper system for any signs of wear, corrosion, or damage

  10. 10. Ensure that all connections are secure and free of dirt or moisture

  11. 11. Test the Wiper Control Module

    If your vehicle is equipped with a wiper control module, it may need to be tested for proper operation. This may require specialized diagnostic equipment

  12. 12. Check for Ground Issues

    Ensure that the wiper system has a good ground connection. A poor ground can lead to erratic behavior and trigger fault codes

  13. 13. Clear the Code

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

  14. 14. Consult the Service Manual

    If the issue persists, refer to the vehicle's service manual for specific diagnostic procedures and specifications related to the wiper system

  15. 15. Seek Professional Help

    If you are unable to diagnose or fix the issue, consider taking the vehicle to a qualified mechanic or dealership for further diagnosis. By following these steps, you should be able to identify and resolve the issue related to the B1446 code