AutoCodes – GMC – B3133 GMC

B3133 GMC Code - All Door Unlock Circuit High

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: B3133 GMC indicates All Door Unlock Circuit High.
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 462

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 B3133 GMC 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 an 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 doors.

OBDII Code B3133 GMC - All Door Unlock Circuit High - AutoCodes.com — B3133 GMC Code - All Door Unlock Circuit High

What does this mean?

What are the Possible Causes of the DTC B3133 GMC?

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 B3133 GMC?

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 B3133 GMC 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.

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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 B3133 GMC Code

1. What are the common symptoms of OBDII code B3133 GMC (All Door Unlock Circuit High)?

- Common symptoms include difficulty unlocking all doors simultaneously, sporadic door unlocking, and malfunctioning key fob remote.

2. What can cause the OBDII code B3133 GMC to trigger?

- This code is typically triggered by a high voltage condition in the all door unlock circuit, often due to a short circuit or faulty wiring.

3. How can I diagnose the issue related to the All Door Unlock Circuit High code?

- To diagnose the issue, you can start by checking the wiring and connections in the all door unlock circuit, inspecting for any visible damage or corrosion.

4. Can a malfunctioning key fob be the cause of the B3133 GMC code?

- Yes, a malfunctioning key fob can potentially cause the All Door Unlock Circuit High code if it is sending incorrect signals to the vehicle's control module.

5. What are the repair tips for fixing the B3133 GMC code?

- Repair tips may include repairing or replacing damaged wiring, connectors, or components in the all door unlock circuit, resetting the vehicle's control module, or reprogramming the key fob if necessary.

6. Is it safe to continue driving with the B3133 GMC code present?

- While the vehicle may still be drivable with this code, it is recommended to address the issue promptly to avoid potential inconvenience or safety concerns related to door unlocking functionality.

7. Can extreme weather conditions affect the All Door Unlock Circuit High code?

- Yes, extreme weather conditions such as excessive heat or moisture can sometimes exacerbate electrical issues in the door unlock circuit, leading to the B3133 GMC code.

8. Are there any recalls or technical service bulletins related to the B3133 GMC code?

- It is advisable to check with the manufacturer or a trusted dealership for any relevant recalls or technical service bulletins that may pertain to the All Door Unlock Circuit High code.

9. Will resetting the vehicle's battery help clear the B3133 GMC code?

- Resetting the vehicle's battery may temporarily clear the code, but if the underlying issue causing the All Door Unlock Circuit High persists, the code is likely to reappear.

10. Can a DIY enthusiast resolve the B3133 GMC code issue, or is professional assistance recommended?

- Depending on your skill level and access to tools, DIY enthusiasts may be able to address the B3133 GMC code by following repair guides or seeking assistance from online automotive forums. However, if unsure, it is recommended to consult a professional technician for accurate diagnosis and repair.