AutoCodes – Generic – B2537

B2537 Code - Rear Fog Lamps Circuit Low

Quick Answer

The Body Control Module (BCM) monitors the rear fog lamp switch signal circuit in order to determine when the rear fog lamp relay is to be energized. Common causes include Faulty Rear Fog Lamps Switch, Rear Fog Lamps Switch harness is open or shorted, Rear Fog Lamps Switch 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: B2537 indicates Rear Fog Lamps Circuit Low.
Common causes: Common causes include Faulty Rear Fog Lamps Switch, Rear Fog Lamps Switch harness is open or shorted, Rear Fog Lamps Switch 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 1,469

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 22, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2537 Description

The Body Control Module (BCM) monitors the rear fog lamp switch signal circuit in order to determine when the rear fog lamp relay is to be energized. When the BCM senses that the rear fog lamp switch signal circuit is grounded momentarily by pressing the rear fog lamp switch, the BCM energizes the rear fog lamp relay by grounding the rear fog lamp relay control circuit.

OBDII Code B2537 - Rear Fog Lamps Circuit Low - AutoCodes.com — B2537 Code - Rear Fog Lamps Circuit Low

What does this mean?

What are the Possible Causes of the DTC B2537?

Faulty Rear Fog Lamps Switch
Rear Fog Lamps Switch harness is open or shorted
Rear Fog Lamps Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B2537?

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 B2537 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 B2537 code?

Need more information on how to fix the B2537 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2537 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2537 Buick — Rear Fog Lamps Circuit Low
B2537 Cadillac — Rear Fog Lamps Circuit Low
B2537 Chevrolet — Rear Fog Lamps Circuit Low
B2537 GMC — Rear Fog Lamps Circuit Low
B2537 Lexus — Roof Control 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 B2537 Code

What does the OBDII code B2537 mean?

B2537 indicates a malfunction in the rear fog lamps circuit, specifically signaling a low voltage or open circuit condition in the wiring or components associated with the rear fog lamps.

What are the common symptoms associated with the B2537 code?

Symptoms may include a malfunctioning rear fog lamp, warning lights on the dashboard, or the rear fog lamps not illuminating when activated.

What could cause the B2537 code to trigger?

Possible causes include a faulty rear fog lamp bulb, damaged wiring or connectors, a defective switch, or issues with the vehicle's body control module (BCM).

How can I diagnose the B2537 code?

Start by inspecting the rear fog lamp bulb and its socket for damage or corrosion. Next, check the wiring and connectors for continuity and integrity. Test the switch and BCM if necessary.

Is it safe to drive with the B2537 code?

While it is generally safe to drive, it is advisable to address the issue promptly to ensure that your rear fog lamps function correctly for visibility in adverse weather conditions.

What are the repair options for the B2537 code?

Repair options may include replacing the rear fog lamp bulb, repairing or replacing damaged wiring, fixing or replacing the switch, or reprogramming or replacing the BCM if needed.

Can I clear the B2537 code after repairs?

Yes, you can clear the B2537 code using an OBDII scanner after performing the necessary repairs. If the issue is resolved, the code should not reappear.

How much does it typically cost to fix the issue related to the B2537 code?

Repair costs can vary widely depending on the specific issue, ranging from a simple bulb replacement costing around $10-$30 to more complex repairs, such as wiring or BCM issues, which could cost $100-$500 or more.

Will the B2537 code affect my vehicle's performance?

The B2537 code primarily affects the functionality of the rear fog lamps and generally does not impact the overall performance of the vehicle. However, it may indicate underlying electrical issues that could require attention.