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Engine-Codes – Generic – B0136

B0136 Code - Open Left Seat Belt Pretensioner Squib Circuit

Quick Answer

The code B0136 indicates an "Open Left Seat Belt Pretensioner Squib Circuit" in the vehicle. Common causes include Damaged wiring or connectors in the left seat belt pretensioner squib circuit, Faulty seat belt pretensioner squib, Corrosion or moisture in the circuit causing a poor 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
B0136 indicates Open Left Seat Belt Pretensioner Squib Circuit.
Common causes
Common causes include Damaged wiring or connectors in the left seat belt pretensioner squib circuit, Faulty seat belt pretensioner squib, Corrosion or moisture in the circuit causing a poor 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code B0136 Description

The code B0136 indicates an "Open Left Seat Belt Pretensioner Squib Circuit" in the vehicle. A seat belt pretensioner is a safety feature that tightens the seat belt in the event of a collision to reduce the forward movement of the occupant and improve the effectiveness of the seat belt. The squib circuit refers to the pyrotechnic device within the seat belt pretensioner that is responsible for activating the mechanism during a crash.

OBDII Code B0136 - Open Left Seat Belt Pretensioner Squib Circuit
B0136 Code - Open Left Seat Belt Pretensioner Squib Circuit

Common Causes of B0136

  1. Damaged wiring or connectors in the left seat belt pretensioner squib circuit.
  2. Faulty seat belt pretensioner squib.
  3. Corrosion or moisture in the circuit causing a poor connection.
  4. Issues with the airbag control module.
  5. Impact or collision that damaged the seat belt pretensioner system.

Symptoms of B0136

  1. Airbag warning light illuminated on the dashboard.
  2. Seat belt pretensioner not tightening during sudden braking or collision.
  3. Audible warning chime indicating a seat belt or airbag system fault.
  4. Vehicle fails airbag system self-test during startup.
  5. Loss of communication with the airbag control module.

How to Fix B0136

  1. Begin by disconnecting the vehicle's battery to prevent accidental deployment of the airbags.
  2. Inspect the wiring and connectors in the left seat belt pretensioner squib circuit for any damage or corrosion. Repair or replace as necessary.
  3. Test the seat belt pretensioner squib using a multimeter to check for continuity. Replace if faulty.
  4. Clear the diagnostic trouble codes from the vehicle's system using a scan tool.
  5. Reconnect the battery and perform a test to ensure the seat belt pretensioner system is functioning properly.

Cost to Fix B0136

The cost of repairing an open left seat belt pretensioner squib circuit can vary depending on the extent of the damage and the specific components that need to be replaced. In general, the cost of parts for this repair can range from $100 to $300, while the labor cost can range from $150 to $300. Therefore, the total cost of the repair could be anywhere from $250 to $600. It's important to note that these are rough estimates, and actual costs may vary based on factors such as the vehicle's make and model, the location of the repair shop, and any additional diagnostic or repair services required. It's recommended to consult with a qualified mechanic or repair shop for a more accurate cost estimate tailored to your specific situation.

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Code B0136 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 B0136 Code

1. What does the OBDII code B0136 mean?

The B0136 code indicates an open circuit in the left seat belt pretensioner squib, which is part of the vehicle's airbag system.

2. What are the common symptoms of code B0136?

Symptoms include the airbag warning light illuminating on the dashboard and possible failure of the seat belt pretensioner to deploy in an accident.

3. What causes the B0136 code to appear?

Common causes include damaged wiring, a disconnected or loose connector, a faulty seat belt pretensioner, or a malfunctioning airbag control module.

4. Can I still drive safely with the B0136 code?

While the vehicle is drivable, the airbag system may not function properly in an accident, posing a safety risk.

5. How is the B0136 code diagnosed?

A technician will use a scan tool to confirm the code, inspect the seat belt pretensioner wiring and connectors, and test the pretensioner circuit for continuity.

6. How do you fix the B0136 code?

Repairs may include repairing or replacing damaged wiring, reconnecting loose connectors, or replacing the faulty seat belt pretensioner.

7. How much does it cost to fix the B0136 code?

Repair costs vary but can range from $100 to $500 depending on whether it's a wiring issue or if the pretensioner needs replacement.

8. Can I reset the B0136 code without fixing the problem?

Clearing the code without addressing the issue will cause it to reappear, and the airbag system will remain compromised.

9. What should I do if the B0136 code comes back after repairs?

If the code reappears, recheck the wiring, connectors, and pretensioner for missed issues, or have the airbag control module inspected.

10. Is it possible for the B0136 code to trigger accidentally?

Yes, the code can be triggered by accidental disconnection of the pretensioner wiring during maintenance or by a weak electrical connection.

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