AutoCodes – Generic – B3150

B3150 Code - Driver Door Lock Switch Circuit

Quick Answer

The Body Control Module (BCM) monitors the voltage level of the door lock and door unlock signal circuits. Common causes include Faulty Driver Door Lock Switch, Driver Door Lock Switch harness is open or shorted, Driver Door Lock 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: B3150 indicates Driver Door Lock Switch Circuit.
Common causes: Common causes include Faulty Driver Door Lock Switch, Driver Door Lock Switch harness is open or shorted, Driver Door Lock 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 1,894

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 Jun 11, 2023

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code B3150 Description

The Body Control Module (BCM) monitors the voltage level of the door lock and door unlock signal circuits. When the driver door lock switch is in the open position, the voltage level in the signal circuit will be near 12 V. When the driver door lock switch is pressed to the lock or unlock position, the voltage level in the appropriate signal circuit will drop to 0 V and the BCM will detect the voltage drop and command the door latches to perform the requested lock or unlock command. The Diagnostic Trouble Code (DTC) will be set when the BCM detects a short to ground in the switch circuit.

OBDII Code B3150 - Driver Door Lock Switch Circuit - AutoCodes.com — B3150 Code - Driver Door Lock Switch Circuit

What does this mean?

What are the Possible Causes of the DTC B3150?

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

How to Fix the DTC B3150?

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 does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B3150 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 B3150 code?

Need more information on how to fix the B3150 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B3150 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B3150 Buick — Driver Door Lock Switch Circuit
B3150 Cadillac — Driver Door Lock Switch Circuit
B3150 Chevrolet — Driver Door Lock Switch Circuit
B3150 GMC — Driver Door Lock Switch Circuit

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 B3150 Code

1. What does the OBDII code B3150 mean?

B3150 indicates an issue in the driver door lock switch circuit, such as a malfunction or wiring problem preventing proper operation of the lock switch.

2. What are the common symptoms of the B3150 code?

Symptoms include the driver door lock not responding, inability to lock/unlock the door electronically, or intermittent functionality of the lock switch.

3. What causes the B3150 code to be triggered?

Common causes include faulty door lock switches, damaged wiring or connectors in the circuit, or a malfunctioning body control module (BCM).

4. Can a faulty driver door lock actuator cause the B3150 code?

Yes, a malfunctioning door lock actuator can contribute to the code if it disrupts the circuit's function or communication.

5. How is the B3150 code diagnosed?

Diagnosis involves checking the door lock switch for proper operation, inspecting wiring and connectors for damage, and using a scan tool to monitor the circuit's signals.

6. Can I continue driving with the B3150 code active?

Yes, but the driver door lock may not function properly, posing a security risk or inconvenience.

7. What repairs can fix the B3150 code?

Repairs may include replacing a faulty door lock switch, repairing or replacing damaged wiring, or reprogramming or replacing the BCM if necessary.

8. How much does it cost to repair the B3150 code?

Repair costs vary depending on the issue, but replacing a door lock switch typically costs $100â€“$300, while more extensive electrical repairs or BCM replacement may cost more.

9. Can I fix the B3150 code myself?

If you're comfortable with basic electrical troubleshooting, you might inspect and replace the door lock switch or repair wiring. However, BCM issues usually require professional assistance.

10. Will clearing the code fix the B3150 issue?

Clearing the code may temporarily remove it, but the underlying problem must be addressed to prevent the code from returning.