AutoCodes – Generic – B3137

B3137 Code - All Door Lock Circuit Low

Quick Answer

The outputs to the door lock actuators are controlled by the Body Control Module (BCM). Common causes include Faulty Inoperative Door Lock Actuator, Inoperative Door Lock Actuator harness is open or shorted, Inoperative Door Lock Actuator 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: B3137 indicates All Door Lock Circuit Low.
Common causes: Common causes include Faulty Inoperative Door Lock Actuator, Inoperative Door Lock Actuator harness is open or shorted, Inoperative Door Lock Actuator 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 1,215

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 Mar 04, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3137 Description

The outputs to the door lock actuators are controlled by the Body Control Module (BCM). When the BCM receives a lock input from a door lock switch, or a keyless entry transmitter, it applies battery positive voltage to the door lock actuator lock control circuit, a ground to the door lock actuator unlock control, and the driver door lock actuator unlock control circuits. When the BCM receives an unlock input from a door lock switch, it applies battery positive voltage to the door lock actuator unlock control, the driver door lock actuator unlock control circuits, and a ground to the door lock actuator lock control circuit. When the BCM receives a single Unlock input from a keyless entry transmitter, it applies battery positive voltage to the driver door lock actuator unlock control circuit and a ground to the door lock actuator lock control circuit to unlock the driver door. A second Unlock input from the transmitter applies battery positive voltage to the door lock actuator unlock control circuit, and a ground to the door lock actuator lock control circuit to unlock the passenger door or doors.

OBDII Code B3137 - All Door Lock Circuit Low - AutoCodes.com — B3137 Code - All Door Lock Circuit Low

What does this mean?

What are the Possible Causes of the DTC B3137?

Faulty Inoperative Door Lock Actuator
Inoperative Door Lock Actuator harness is open or shorted
Inoperative Door Lock Actuator circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B3137?

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 B3137 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 B3137 code?

Need more information on how to fix the B3137 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B3137 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B3137 Buick — All Door Lock Circuit Low
B3137 Cadillac — All Door Lock Circuit Low
B3137 Chevrolet — All Door Lock Circuit Low
B3137 GMC — All Door Lock Circuit Low

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 B3137 Code

1. What does OBDII code B3137 mean?

Code B3137 indicates a low voltage condition in the all-door lock circuit, suggesting a potential issue with the wiring, actuators, or control module responsible for locking all vehicle doors.

2. What are the common symptoms of code B3137?

Symptoms may include doors failing to lock or unlock, intermittent door lock operation, or unresponsive door lock switches.

3. What causes code B3137 to be triggered?

This code can be triggered by damaged wiring, a malfunctioning door lock actuator, a faulty door lock relay, or a problem with the body control module (BCM).

4. How can I diagnose the cause of code B3137?

Start by inspecting the door lock wiring and connectors for damage or corrosion. Test the door lock actuators and relays for proper operation, and check the BCM for faults.

5. Can a blown fuse cause code B3137?

Yes, a blown fuse in the door lock circuit can cause a low voltage condition, leading to this code being stored.

6. How do I fix code B3137?

Repairs may involve replacing damaged wiring, faulty door lock actuators, or a malfunctioning BCM. Ensure all connections are clean and secure.

7. Will code B3137 prevent my car from being locked?

In some cases, yes. If the door lock circuit is not functioning properly, you may not be able to lock or unlock the doors electronically.

8. Can I still drive my car with code B3137?

Yes, the vehicle is typically still drivable, but the inability to lock or unlock doors can pose a security risk.

9. How much does it cost to fix code B3137?

Repair costs vary depending on the specific issue but may range from $100 for wiring repairs to several hundred dollars if a BCM or actuator replacement is needed.

10. Can I clear code B3137 without fixing the problem?

You can clear the code with an OBDII scanner, but it will likely return if the underlying issue is not resolved.