B1449 – Wiper Park Sense Circuit Short To Ground

The ODBII code B1449 indicates a malfunction in the wiper park sense circuit, specifically a short to ground condition, which means there is an unintended connection to the ground in the circuit that detects the wiper’s parked position.

The severity of ODBII code B1449 is generally considered moderate.

Common Causes For: B1448 Wiper Park Sense Circuit Short To Battery

• Damaged wiring or connectors in the wiper park circuit.
• Shorted wiper motor.
• Faulty wiper park switch.
• Corroded or loose electrical connections.
• Malfunctioning body control module (BCM).
• Water intrusion or moisture in the electrical components.

Common misdiagnosis for B1449 Wiper Park Sense Circuit Short To Ground

• Faulty windshield wiper motor
• Defective wiper switch
• Damaged wiring harness
• Shorted or corroded connectors
• Malfunctioning body control module (BCM)
• Incorrectly installed wiper assembly
• Faulty rain sensor (if equipped)

Common Troubleshooting Steps

The OBD-II code B1449 indicates a problem with the Wiper Park Sense Circuit, specifically a short to ground. This code is typically associated with the windshield wiper system and can affect the wiper operation. Here are some common troubleshooting steps to diagnose and resolve the issue:

• Visual Inspection:
• Check the wiring and connectors related to the wiper motor and the park sense circuit. Look for any signs of damage, fraying, or corrosion.
• Inspect the wiper motor itself for any physical damage.
• Check Fuses:
• Locate the fuse box and check for any blown fuses related to the wiper system. Replace any blown fuses and see if the code persists.
• Test the Wiper Motor:
• Disconnect the wiper motor connector and use a multimeter to test the motor for continuity. If the motor is shorted, it may need to be replaced.
• Check Ground Connections:
• Ensure that all ground connections related to the wiper system are secure and free of corrosion. A poor ground can cause a short circuit.
• Inspect the Park Switch:
• The park switch is responsible for signaling the wiper motor to return to the park position. Test the switch for proper operation and continuity.
• Check for Shorts in the Wiring:
• Use a multimeter to check for shorts in the wiring harness. Look for any wires that may be pinched, frayed, or touching the vehicle chassis.
• Scan for Additional Codes:
• Use an OBD-II scanner to check for any additional trouble codes that may provide more context to the issue.
• Clear the Code:
• After performing the above checks and repairs, clear the code using an OBD-II scanner and take the vehicle for a test drive to see if the code returns.
• Consult Service Manual:
• If the issue persists, consult the vehicle’s service manual for specific diagnostic procedures related to the wiper system and the B1449 code.
• Seek Professional Help:
• If you are unable to resolve the issue after 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 steps, you should be able to identify and resolve the issue causing the B1449 code.