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Engine-Codes – Generic – B3133

B3133 Code - All Door Unlock Circuit High

Quick Answer

The B3133 code indicates a problem with the all-door unlock circuit being detected as high, meaning there is an abnormal voltage level in the circuit that controls the unlocking of all doors in the vehicle. Common causes include Faulty wiring connections in the all-door unlock circuit, Malfunctioning door lock actuator in one or more doors, Issues with the central locking system or body control module. 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 indicates All Door Unlock Circuit High.
Common causes
Common causes include Faulty wiring connections in the all-door unlock circuit, Malfunctioning door lock actuator in one or more doors, Issues with the central locking system or body control module.
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.
What is this?
Table of contents Created and updated by William Orellana on Aug 25, 2024
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Code B3133 Description

The B3133 code indicates a problem with the all-door unlock circuit being detected as high, meaning there is an abnormal voltage level in the circuit that controls the unlocking of all doors in the vehicle. This issue can prevent all doors from unlocking properly, affecting the convenience and safety of entering and exiting the vehicle. It can also impact the security system of the vehicle if doors do not unlock as intended. The code may be triggered by a faulty wiring connection, a malfunctioning door lock actuator, a problem with the central locking system, or a malfunction in the body control module.

OBDII Code B3133 - All Door Unlock Circuit High
B3133 Code - All Door Unlock Circuit High

Common Causes of B3133

  1. Faulty wiring connections in the all-door unlock circuit.
  2. Malfunctioning door lock actuator in one or more doors.
  3. Issues with the central locking system or body control module.
  4. Water damage or corrosion in the door lock mechanisms.
  5. Electrical short circuits in the door lock system.

Symptoms of B3133

  1. All doors fail to unlock when using the key fob or interior door lock switch.
  2. Unusual clicking or buzzing noises coming from the door lock actuators.
  3. Doors may unlock intermittently or only unlock partially.
  4. The door locks may cycle repeatedly when attempting to unlock the doors.
  5. The interior lights may not turn on when the doors are unlocked.

How to Fix B3133

  1. Begin by inspecting the wiring connections in the all-door unlock circuit for any signs of damage or corrosion.
  2. Test the door lock actuators in each door to determine if any are faulty and need replacement.
  3. Check the central locking system and body control module for any malfunctions using a diagnostic tool.
  4. Repair or replace any damaged wiring, connectors, or components in the all-door unlock circuit.
  5. Clear the diagnostic trouble codes from the vehicle's system and test the door lock operation to ensure the issue has been resolved.

Cost to Fix B3133

The cost of repairing the all-door unlock circuit high code (B3133) can vary depending on the specific cause of the issue and the parts/labour required for the repair. On average, the repair costs for this issue can range from $100 to $300, including parts and labour. However, it is important to note that diagnosis time and labour rates at auto repair shops can vary based on various factors, so it is recommended to get a personalized estimate from a local auto repair shop.

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Code B3133 Information for Specific Makes

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 Code

1. What does the OBDII code B3133 mean?

B3133 indicates that the vehicle’s control module has detected a high voltage condition in the all-door unlock circuit.

2. What are the common symptoms of the B3133 code?

Symptoms may include all doors failing to unlock, intermittent door unlocking, or no response from the door lock/unlock buttons.

3. What causes the B3133 code to appear?

Common causes include a short circuit, damaged wiring, a faulty door lock actuator, or a malfunctioning door lock control module.

4. Can a blown fuse trigger the B3133 code?

Yes, a blown fuse in the door lock circuit can cause the system to malfunction and trigger the B3133 code.

5. How do I diagnose the B3133 code?

Start by inspecting the wiring and connections in the door lock circuit for damage or corrosion. Use a multimeter to check for proper voltage and continuity.

6. How can I fix the B3133 code?

Repairs may involve replacing damaged wiring, fixing a short circuit, replacing a faulty door lock actuator, or reprogramming the control module if necessary.

7. Can I still drive my car with the B3133 code?

Yes, but you may experience inconvenience with door locking and unlocking functionality, which could impact vehicle security.

8. How much does it cost to repair the B3133 code?

Repair costs can vary widely depending on the issue. Wiring repairs might cost $50–$150, while replacing a door lock actuator could range from $150–$300.

9. Can a weak car battery cause the B3133 code?

A weak or failing car battery is unlikely to directly cause this code but could potentially affect the functionality of the door lock system.

10. Do I need to reset the code after repairs?

Yes, after completing the repairs, use an OBDII scanner to clear the code and verify that it does not return.

Discuss the causes and fixes for B3133 OBDII Code

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