WOMS
B code body Low severity

B1377 Oil Change Lamp Circuit Failure

The OBD2 code B1377 indicates a malfunction in the oil change lamp circuit, which may involve issues with the wiring, bulb, or the control module responsible for monitoring the oil change reminder system

Definition

The OBD2 code B1377 indicates a malfunction in the oil change lamp circuit, which may involve issues with the wiring, bulb, or the control module responsible for monitoring the oil change reminder system

Common causes

  • Faulty oil change lamp bulb
  • Damaged wiring or connectors in the circuit
  • Malfunctioning oil change reminder module
  • Short circuit in the oil change lamp circuit
  • Open circuit in the oil change lamp circuit
  • Corroded terminals or connections
  • Faulty engine control module (ECM) or body control module (BCM)

Common misdiagnoses

  • Faulty oil pressure sensor
  • Malfunctioning engine control module (ECM)
  • Wiring issues or shorts in the oil change lamp circuit
  • Defective oil change lamp or indicator
  • Incorrect oil level or quality
  • Problems with the vehicle's body control module (BCM)
  • Issues with the instrument cluster or dashboard display

Troubleshooting steps

  1. 1. Check the Owner's Manual

    Refer to the vehicle's owner's manual for specific information about the oil change lamp system and any related components

  2. 2. Inspect the Oil Change Lamp

    Ensure that the oil change lamp itself is functioning properly. Check the bulb or LED for any signs of damage or failure

  3. 3. Examine the Wiring and Connectors

    Inspect the wiring and connectors associated with the oil change lamp circuit. Look for any signs of fraying, corrosion, or loose connections that could cause a poor electrical connection

  4. 4. Check the Oil Change Interval Reset

    If the oil change has recently been performed, ensure that the oil change interval has been reset correctly. This is often done through the vehicle's onboard computer or dashboard settings

  5. 5. Scan for Additional Codes

    Use an OBD-II scanner to check for any additional trouble codes that may be present. Other codes could provide more context for the issue

  6. 6. Test the Circuit

    Use a multimeter to test the voltage and continuity of the oil change lamp circuit. This can help identify if there is a break in the circuit or if the lamp is receiving power

  7. 7. Inspect the Engine Control Module (ECM)

    In some cases, the issue may be related to the ECM. Check for any software updates or known issues with the ECM that could affect the oil change lamp circuit

  8. 8. Check for Ground Issues

    Ensure that the ground connections for the oil change lamp circuit are secure and free of corrosion. A poor ground can lead to circuit failures

  9. 9. Consult Technical Service Bulletins (TSBs)

    Look for any TSBs related to the oil change lamp circuit for your specific vehicle make and model. Manufacturers may have issued guidance on common issues and fixes

  10. 10. Seek Professional Help

    If the issue persists after performing these steps, consider consulting a professional mechanic or technician who has experience with your vehicle's make and model. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the B1377 code