B1576 – Lamp Park Input Circuit Open

The ODBII code B1576 indicates that there is an open circuit in the Lamp Park Input, which typically relates to a malfunction in the system that controls the parking lamps or related lighting functions.

The severity of ODBII code B1576 is generally considered moderate.

Common Causes For: B1575 Lamp Park Input Circuit Failure

• Open circuit in the wiring
• Faulty lamp park switch
• Damaged or corroded connectors
• Shorted or damaged wiring harness
• Faulty body control module (BCM)
• Poor ground connection

Common misdiagnosis for B1576 Lamp Park Input Circuit Open

• Faulty body control module (BCM)
• Defective headlight switch
• Wiring issues or shorts in the circuit
• Bad ground connections
• Malfunctioning relay
• Incorrectly installed or damaged bulbs
• Issues with the instrument cluster
• Faulty connectors or terminals

Common Troubleshooting Steps

The OBD-II code B1576 refers to a “Lamp Park Input Circuit Open” issue, which typically indicates a problem with the circuit that controls the park lamp (or parking light) system in a vehicle. Here are some common troubleshooting steps to diagnose and resolve this issue:

• Check the Vehicle’s Manual: Refer to the vehicle’s service manual for specific information about the park lamp circuit, including wiring diagrams and component locations.
• Visual Inspection:
• Inspect the wiring and connectors associated with the park lamp circuit for any signs of damage, corrosion, or loose connections.
• Look for frayed wires, broken connectors, or any other physical damage.
• Check the Park Lamp Bulbs:
• Ensure that the park lamp bulbs are functioning correctly. Replace any burnt-out bulbs.
• Check for proper seating of the bulbs in their sockets.
• Test the Park Lamp Switch:
• Verify that the park lamp switch is functioning properly. This switch is often located on the steering column or dashboard.
• Use a multimeter to check for continuity when the switch is activated.
• Inspect the Fuse:
• Check the fuse related to the park lamp circuit. If the fuse is blown, replace it and see if the code returns.
• If the fuse blows again, there may be a short circuit in the wiring.
• Check for Short Circuits:
• Use a multimeter to check for continuity in the park lamp circuit. Look for any shorts to ground or between wires that should not be connected.
• Scan for Additional Codes:
• Use an OBD-II scanner to check for any other related trouble codes that may provide additional context for the issue.
• Test the Park Lamp Relay:
• If applicable, test the park lamp relay to ensure it is functioning correctly. A faulty relay can cause an open circuit.
• Inspect the Body Control Module (BCM):
• If all other components check out, the issue may lie within the Body Control Module. Check for any software updates or known issues related to the BCM.
• Clear the Code and Test Drive:
• After performing repairs, clear the trouble code using an OBD-II scanner and take the vehicle for a test drive to see if the code returns. 1
• Consult a Professional:
• If the issue persists after performing 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 B1576 code.