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Engine-Codes – Generic – B1135

B1135 Code - Left Right Side Air Bag Module Short

Quick Answer

The B1135 diagnostic trouble code indicates a problem with the left right side airbag module short circuit. Common causes include Electrical issues: The most common cause of a left right side airbag module short is electrical problems, such as a damaged wiring harness, loose connections, or a faulty airbag module, Water damage: Water infiltration into the airbag system can cause corrosion and short circuits, leading to malfunction, Impact damage: A previous collision or impact to the vehicle can damage the airbag module and cause a short circuit. 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
B1135 indicates Left Right Side Air Bag Module Short.
Common causes
Common causes include Electrical issues: The most common cause of a left right side airbag module short is electrical problems, such as a damaged wiring harness, loose connections, or a faulty airbag module, Water damage: Water infiltration into the airbag system can cause corrosion and short circuits, leading to malfunction, Impact damage: A previous collision or impact to the vehicle can damage the airbag module and cause a short circuit.
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 Sep 13, 2024
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Code B1135 Description

The B1135 diagnostic trouble code indicates a problem with the left right side airbag module short circuit. This means that there is an electrical issue in the airbag system on the left side of the vehicle, which could potentially prevent the airbag from deploying in the event of a collision. The airbag system is a critical safety feature in modern vehicles, designed to protect occupants in the event of a crash by deploying airbags to cushion the impact. A short circuit in the airbag module can compromise the system's ability to function properly, putting the driver and passengers at risk of injury in the event of an accident.

OBDII Code B1135 - Left Right Side Air Bag Module Short
B1135 Code - Left Right Side Air Bag Module Short

Common Causes of B1135

  1. Electrical issues: The most common cause of a left right side airbag module short is electrical problems, such as a damaged wiring harness, loose connections, or a faulty airbag module.
  2. Water damage: Water infiltration into the airbag system can cause corrosion and short circuits, leading to malfunction.
  3. Impact damage: A previous collision or impact to the vehicle can damage the airbag module and cause a short circuit.
  4. Manufacturing defect: In some cases, a manufacturing defect in the airbag module or wiring can lead to a short circuit.
  5. Wear and tear: Over time, the components of the airbag system can degrade, leading to electrical issues and shorts.

Symptoms of B1135

  1. Airbag warning light on the dashboard: One of the most common symptoms of a left right side airbag module short is the illumination of the airbag warning light on the dashboard. This light is designed to alert the driver to a potential issue with the airbag system.
  2. Non-deployment of airbag: If the left right side airbag module is shorted, the airbag may not deploy in the event of a collision, leaving occupants without the necessary protection.
  3. Intermittent airbag deployment: In some cases, a short circuit in the airbag module may cause the airbag to deploy unexpectedly or intermittently, which can be dangerous for the occupants.
  4. Faulty airbag system: A left right side airbag module short can lead to a malfunction in the entire airbag system, affecting the deployment of other airbags in the vehicle.

How to Fix B1135

  1. Diagnose the issue: The first step in repairing a left right side airbag module short is to diagnose the exact cause of the problem. This may involve using a diagnostic scanner to retrieve the trouble codes and inspecting the airbag system for any visible damage.
  2. Repair or replace damaged components: Depending on the cause of the short circuit, the damaged components may need to be repaired or replaced. This could include repairing the wiring harness, replacing the airbag module, or addressing any other electrical issues.
  3. Clear the trouble codes: Once the repairs have been made, the trouble codes should be cleared from the vehicle's computer system to reset the airbag system.
  4. Test the airbag system: After the repairs have been completed, the airbag system should be tested to ensure that it is functioning properly and that the airbags deploy as intended in a controlled environment.

Cost to Fix B1135

The cost of repairing a left right side airbag module short can vary depending on the extent of the damage and the specific components that need to be repaired or replaced. In general, the cost of parts for an airbag module replacement can range from $200 to $1000, while the labor costs can range from $100 to $300. Overall, the total repair cost for this issue could range from $300 to $1300. It's important to note that these are rough estimates, and the actual cost may vary based on factors such as the vehicle make and model, the location of the repair shop, and the extent of the damage. Additionally, the diagnosis time and labor rates at auto repair shops can also impact the final cost. It's recommended to consult with a qualified mechanic for a more accurate estimate based on the specific circumstances of your vehicle.

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Code B1135 Information for Specific Makes

Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

  • Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
  • Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
  • Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
  • Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.

Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

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 B1135 Code

What does the OBDII code B1135 mean?

The OBDII code B1135 indicates a short circuit issue in the left or right side airbag module, which can affect the airbag system's performance.

What are the common symptoms of a B1135 code?

Common symptoms include the airbag warning light being illuminated on the dashboard and potential issues with the deployment of side airbags in the event of a collision.

What could cause the B1135 code to trigger?

Causes may include damaged wiring or connectors, a faulty airbag module, or issues with the vehicle’s electrical system affecting the airbag circuit.

How can I diagnose the B1135 code?

To diagnose the B1135 code, use an OBDII scanner to confirm the code, inspect the airbag module and wiring for damage, and check for any other related trouble codes.

Is it safe to drive a vehicle with a B1135 code?

It is not safe to drive a vehicle with a B1135 code, as it indicates a potential failure in the airbag system, which could compromise passenger safety in an accident.

What are some common repair tips for a B1135 code?

Repair tips include checking and repairing any damaged wiring or connectors, replacing a faulty airbag module, and ensuring all connections are secure and free of corrosion.

Can a B1135 code be reset without fixing the problem?

While the B1135 code can be temporarily cleared with an OBDII scanner, the underlying issue must be resolved to ensure the airbag system functions correctly and the code does not return.

How much does it typically cost to fix a B1135 code?

Repair costs for a B1135 code can vary widely, ranging from $100 to $1,000 or more, depending on whether it involves simple wiring repairs or the replacement of the airbag module.

Will clearing the B1135 code turn off the airbag light?

Clearing the B1135 code may turn off the airbag light temporarily, but if the underlying issue is not fixed, the light will likely reappear.

Discuss the causes and fixes for B1135 OBDII Code

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