B1293 – Battery Power Relay Circuit Open

The ODBII code B1293 indicates that there is an open circuit in the battery power relay, which can prevent the relay from functioning properly and may affect the vehicle’s electrical systems.

The severity of ODBII code B1293 is moderate.

Common Causes For: B1292 Battery Power Relay Circuit Failure

• Faulty battery power relay
• Open or damaged wiring in the relay circuit
• Poor connections or corroded terminals
• Blown fuse in the relay circuit
• Faulty engine control module (ECM)
• Malfunctioning ignition switch
• Issues with the battery itself

Common misdiagnosis for B1293 Battery Power Relay Circuit Open

• Faulty battery
• Bad alternator
• Corroded battery terminals
• Faulty wiring or connectors
• Defective power relay
• Malfunctioning body control module (BCM)
• Issues with the ignition switch
• Faulty fuses

Common Troubleshooting Steps

The OBD-II code B1293 indicates a problem with the battery power relay circuit, specifically that the circuit is open. This can lead to issues with the vehicle’s electrical systems, including the battery not being charged properly or other components not receiving power. Here are some common troubleshooting steps to diagnose and resolve the issue:

• Check the Battery:
• Ensure the battery is fully charged and in good condition. Check for any corrosion on the terminals and clean them if necessary.
• Inspect Fuses:
• Check the fuses related to the battery power relay circuit. Replace any blown fuses.
• Examine the Relay:
• Locate the battery power relay and inspect it for any signs of damage or corrosion. If necessary, test the relay using a multimeter or replace it with a known good relay.
• Inspect Wiring and Connectors:
• Check the wiring and connectors associated with the battery power relay circuit for any signs of damage, fraying, or corrosion. Repair or replace any damaged wiring or connectors.
• Test the Relay Circuit:
• Use a multimeter to test the relay circuit for continuity. Ensure that there are no open circuits or shorts in the wiring.
• Check Ground Connections:
• Ensure that all ground connections related to the battery power relay are secure and free of corrosion. A poor ground can cause circuit issues.
• Scan for Additional Codes:
• Use an OBD-II scanner to check for any additional trouble codes that may provide more context to the issue. Address any other codes that may be present.
• Inspect the Power Distribution Center:
• If applicable, check the power distribution center for any issues. Ensure that all connections are secure and that there are no signs of damage.
• Test the Battery Power Relay Control Circuit:
• If the relay is controlled by the vehicle’s computer, check the control circuit for proper operation. This may involve checking for voltage at the relay control terminal when the ignition is on.
• Consult Wiring Diagrams:
• Refer to the vehicle’s service manual for wiring diagrams to understand the circuit layout and identify any other components that may be involved. 1
• Perform a Visual Inspection:
• Conduct a thorough visual inspection of the engine bay and under the dashboard for any signs of damage, loose connections, or other issues that could affect the battery power relay circuit. 1
• Reset the Code:
• After performing repairs, clear the code using an OBD-II scanner and take the vehicle for a test drive to see if the code returns. If the issue persists after following these steps, it may be necessary to consult a professional mechanic or technician for further diagnosis and repair.