AutoCodes – Generic – B2527

B2527 Code - Left Rear Stop Lamp Circuit Failure

Quick Answer

The Body Control Module (BCM) monitors the Left Rear Stop Lamp. Common causes include Faulty Left Rear Stop Lamp, Left Rear Stop Lamp harness is open or shorted, Left Rear Stop Lamp circuit poor electrical connection. 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: B2527 indicates Left Rear Stop Lamp Circuit Failure.
Common causes: Common causes include Faulty Left Rear Stop Lamp, Left Rear Stop Lamp harness is open or shorted, Left Rear Stop Lamp circuit poor electrical connection.
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.

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Code Popularity 11,102

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Dec 17, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2527 Description

The Body Control Module (BCM) monitors the Left Rear Stop Lamp. The BCM sets the OBDII code when the Left Rear Stop Lamp is not to factory specifications.

OBDII Code B2527 - Left Rear Stop Lamp Circuit Failure - AutoCodes.com — B2527 Code - Left Rear Stop Lamp Circuit Failure

What does this mean?

What are the Possible Causes of the DTC B2527?

Faulty Left Rear Stop Lamp
Left Rear Stop Lamp harness is open or shorted
Left Rear Stop Lamp circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B2527?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B2527 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B2527 code?

Need more information on how to fix the B2527 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2527 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2527 Buick — Front Fog Lamps Circuit Low
B2527 Cadillac — Front Fog Lamps Circuit Low
B2527 Chevrolet — Front Fog Lamps Circuit Low
B2527 GMC — Front Fog Lamps Circuit Low
B2527 Lexus — Roof Open Switch Malfunction

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 B2527 Code

1. What are the common symptoms of OBDII code B2527 (Left Rear Stop Lamp Circuit Failure)?

The common symptoms of code B2527 include the left rear stop lamp failing to illuminate when the brake pedal is pressed.

2. What are the potential causes of OBDII code B2527?

Potential causes of code B2527 include a faulty left rear stop lamp bulb, damaged wiring or connectors in the left rear stop lamp circuit, or a defective stop lamp switch.

3. How can I diagnose the cause of OBDII code B2527?

To diagnose code B2527, you can start by visually inspecting the left rear stop lamp bulb and its wiring. Check for any visible damage or corrosion. You can also use a multimeter to test the continuity of the wiring and connectors in the left rear stop lamp circuit.

4. Can a blown fuse cause OBDII code B2527?

Yes, a blown fuse in the left rear stop lamp circuit can also cause OBDII code B2527. Check the fuse related to the stop lamps and replace it if necessary.

5. What are some repair tips for resolving OBDII code B2527?

Some repair tips for code B2527 include checking and replacing the left rear stop lamp bulb, repairing any damaged wiring or connectors in the circuit, ensuring proper grounding, and adjusting or replacing the stop lamp switch if needed.

6. Is it safe to continue driving with OBDII code B2527 present?

It is not recommended to continue driving with OBDII code B2527, as it indicates a failure in the left rear stop lamp circuit, which compromises your vehicle's safety by potentially not alerting other drivers when you are braking.

7. Can OBDII code B2527 be reset without fixing the issue?

Resetting the code without fixing the underlying issue will only temporarily clear the code. The problem causing code B2527 will persist, and the code will likely reappear once the issue is detected again.

8. How can I prevent OBDII code B2527 from occurring in the future?

To prevent OBDII code B2527 from occurring in the future, regularly inspect your vehicle's stop lamps for proper functioning, replace bulbs as needed, and maintain the wiring and connectors in good condition.

9. Do I need special tools to diagnose and repair OBDII code B2527?

While specialized automotive diagnostic tools can be helpful for pinpointing the exact cause of OBDII code B2527, basic tools like a multimeter and basic hand tools are usually sufficient for diagnosing and repairing the issue.

10. Can a DIY enthusiast fix OBDII code B2527, or is professional help recommended?

Depending on your skills and experience with automotive repairs, a DIY enthusiast can often fix OBDII code B2527 by following proper diagnostic procedures and repair tips. However, if you are unsure or uncomfortable with electrical systems, seeking professional help is recommended.