B1385 Oil Level Lamp Circuit Open

Definition

Common causes

• Faulty oil level sensor
• Damaged wiring or connectors
• Open circuit in the oil level lamp circuit
• Blown fuse
• Faulty engine control module (ECM)

Common misdiagnoses

• Faulty oil level sensor
• Wiring issues or shorts in the circuit
• Malfunctioning engine control module (ECM)
• Incorrect oil level readings due to oil contamination
• Faulty dashboard gauge or indicator light
• Issues with the vehicle's electrical system
• Problems with the oil pressure sensor

Troubleshooting steps

1. 1. Visual Inspection

   Check Wiring and Connectors: Inspect the wiring harness and connectors associated with the oil level sensor for any signs of damage, corrosion, or loose connections

2. 2. Look for Shorts or Breaks

   Check for any frayed wires or breaks in the insulation that could cause an open circuit

3. 3. Check the Oil Level Sensor

   Test the Sensor: If accessible, test the oil level sensor for continuity using a multimeter. The sensor should have a specific resistance value when the oil level is at a certain point

4. 4. Inspect for Contamination

   Ensure that the sensor is not contaminated with oil or debris, which could affect its operation

5. 5. Check the Circuit

   Use a Multimeter: Measure the voltage at the oil level sensor connector with the ignition on (but the engine off). You should see a voltage reading if the circuit is functioning properly

6. 6. Check for Ground

   Ensure that the sensor has a good ground connection. A poor ground can cause the circuit to appear open

7. 7. Inspect the Oil Level Lamp

   Check the Lamp: Ensure that the oil level warning lamp on the dashboard is functioning correctly. A burned-out bulb can sometimes trigger a fault code

8. 8. Test the Circuit

   If possible, test the circuit that powers the oil level lamp to ensure it is functioning correctly

9. 9. Scan for Additional Codes

   Check for Other Codes: Use an OBD-II scanner to check for any additional trouble codes that may provide more context or indicate related issues

10. 10. Clear the Code and Test Drive

    Clear the Code: After performing the above checks and repairs, clear the trouble code using an OBD-II scanner

11. 11. Test Drive

    Take the vehicle for a test drive to see if the code reappears. Monitor the oil level lamp to ensure it operates correctly

12. 12. Seek Professional Help

    Professional Diagnosis: If you are unable to resolve the issue, consider seeking help from a qualified mechanic or automotive technician who can perform more advanced diagnostics. By following these steps, you should be able to identify and resolve the issue related to the B1385 code. Always ensure safety precautions are taken when working on a vehicle's electrical system