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Engine-Codes – Generic – B1377

B1377 Code - Oil Change Lamp Circuit Failure

Quick Answer

The B1377 diagnostic trouble code (DTC) specifically refers to an Oil Change Lamp Circuit Failure. Common causes include Faulty oil change reminder circuit, Blown fuse related to the oil change reminder system, Wiring issues or shorts in the circuit. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
B1377 indicates Oil Change Lamp Circuit Failure.
Common causes
Common causes include Faulty oil change reminder circuit, Blown fuse related to the oil change reminder system, Wiring issues or shorts in the circuit.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code B1377 Description

The B1377 diagnostic trouble code (DTC) specifically refers to an Oil Change Lamp Circuit Failure. This code is typically associated with vehicles that have an oil change reminder light or indicator on the dashboard. When this code is triggered, it means that there is a malfunction in the circuit that controls the oil change reminder system.

OBDII Code B1377 - Oil Change Lamp Circuit Failure
B1377 Code - Oil Change Lamp Circuit Failure

Common Causes of B1377

  1. Faulty oil change reminder circuit
  2. Blown fuse related to the oil change reminder system
  3. Wiring issues or shorts in the circuit
  4. Malfunctioning oil change reminder module
  5. Corrosion or damage to connectors in the circuit

Symptoms of B1377

  1. Oil change reminder light not illuminating on the dashboard
  2. Inaccurate or inconsistent oil change reminders
  3. Engine performance issues
  4. Reduced fuel efficiency

How to Fix B1377

  1. Begin by inspecting the oil change reminder circuit for any visible damage or corrosion.
  2. Check and replace any blown fuses related to the oil change reminder system.
  3. Test the wiring in the circuit for continuity and repair any shorts or breaks.
  4. Replace the oil change reminder module if it is found to be faulty.
  5. Clear the DTC from the vehicle's computer system and test to ensure the oil change reminder system is functioning properly.

Cost to Fix B1377

The typical repair costs for addressing a B1377 code can vary depending on the specific cause of the issue. On average, the parts and labor for this repair can range from $100 to $300. However, it is important to note that labor rates and part prices can vary significantly based on location, vehicle make and model, and the specific repair shop. It is recommended to consult with a trusted mechanic or repair shop to get a more accurate estimate for addressing this issue.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1377 Code

1. What does OBDII code B1377 mean?

Code B1377 indicates an issue with the oil change lamp circuit, which could prevent the oil change reminder light from functioning correctly.

2. What are the common symptoms of code B1377?

The most common symptom is the oil change reminder light not turning on or staying illuminated even after an oil change.

3. What causes the oil change lamp circuit failure?

Common causes include a faulty oil change reminder light, damaged wiring or connectors in the circuit, or a malfunctioning body control module (BCM).

4. How can I diagnose code B1377?

Start by visually inspecting the wiring and connectors related to the oil change lamp circuit. Use a multimeter to test for continuity and check the functionality of the oil change lamp.

5. Can a blown fuse cause code B1377?

Yes, a blown fuse connected to the oil change lamp circuit can cause the circuit to fail and trigger this code.

6. Is it safe to drive with code B1377?

Yes, as this code does not affect engine performance, but you may not receive timely reminders for oil changes, which could lead to long-term engine damage.

7. What repairs can fix code B1377?

Repairs may include replacing the oil change reminder light, repairing or replacing damaged wiring, or replacing a faulty BCM.

8. How much does it cost to fix code B1377?

The cost depends on the specific issue. Replacing a light or fixing wiring might cost $50–$150, while a BCM replacement can cost $300–$800 or more.

9. Can I reset code B1377 without repairs?

Clearing the code with an OBDII scanner may temporarily turn off the check engine light, but the code will likely return if the underlying issue isn’t resolved.

10. How can I prevent code B1377 from recurring?

Regularly inspect and maintain the oil change lamp circuit, check wiring for damage, and ensure the lamp is functioning correctly during routine maintenance.

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