AutoCodes – Generic – B3132

B3132 Code - All Door Unlock 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: B3132 indicates All Door Unlock 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 870

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 B3132 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 B3132 - All Door Unlock Circuit Low - AutoCodes.com — B3132 Code - All Door Unlock Circuit Low

What does this mean?

What are the Possible Causes of the DTC B3132?

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 B3132?

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 B3132 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 B3132 code?

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Need Help with the Code?

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Information for Specific Makes

B3132 Buick — All Door Unlock Circuit Low
B3132 Cadillac — All Door Unlock Circuit Low
B3132 Chevrolet — All Door Unlock Circuit Low
B3132 GMC — All Door Unlock 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 B3132 Code

1. What does OBDII code B3132 mean?

Code B3132 indicates an issue with the "All Door Unlock Circuit Low," meaning the circuit responsible for unlocking all doors is not receiving the correct voltage.

2. What are the common symptoms of code B3132?

Symptoms include the inability to unlock all doors using the central locking system, erratic door lock behavior, or the key fob failing to unlock doors.

3. What causes code B3132?

Possible causes include a faulty door lock actuator, damaged wiring or connectors in the unlock circuit, a malfunctioning body control module (BCM), or a drained vehicle battery.

4. Can a weak car battery trigger code B3132?

Yes, a weak or failing battery can cause insufficient voltage in the unlock circuit, which may trigger this code.

5. How do you diagnose code B3132?

Diagnosis involves checking the wiring and connectors in the door unlock circuit for damage, testing the door lock actuator, and verifying proper function of the BCM and key fob.

6. How can code B3132 be fixed?

Repairs may include replacing a faulty door lock actuator, repairing or replacing damaged wiring, cleaning corroded connectors, or reprogramming or replacing the BCM.

7. Can I still drive with code B3132 active?

Yes, you can drive the vehicle, but the central locking system may not function properly, which could be inconvenient or pose a security risk.

8. Is code B3132 specific to certain vehicle makes or models?

While it can appear on various makes and models, the exact troubleshooting steps and affected components may vary depending on the vehicle.

9. Can a blown fuse cause code B3132?

Yes, a blown fuse in the door lock circuit can result in low voltage and trigger this code.

10. Do I need special tools to fix code B3132?

Basic tools like a multimeter for voltage testing and an OBDII scanner are typically required. In some cases, advanced diagnostic equipment may be needed for BCM reprogramming.