OBD Guide
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B1B2B

1st Row Driver Seat Belt Pretensioner Circuit Shorted Together

B1B2B is an OBD-II diagnostic trouble code meaning: 1st Row Driver Seat Belt Pretensioner Circuit Shorted Together. Common causes: wiring harness damage, seat belt pretensioner malfunction. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Airbag light is on
  • The safety system may not work in an accident
  • Error persists after OBD-II scan

Causes

  • Wiring harness damage
  • Seat belt pretensioner malfunction
  • Short circuit in the circuit
  • Problems with the SRS control unit

How to Fix

  1. Check the wiring harness for damage
  2. Diagnose seat belt pretensioner
  3. Check the circuit for short circuit
  4. Replace damaged components
  5. Reset the error and check for reappearance

Related codes

B1B2AB1B2C

FAQ

What does the B1B2B code mean?

B1B2B is an OBD-II diagnostic trouble code that indicates: 1st Row Driver Seat Belt Pretensioner Circuit Shorted Together

What causes a B1B2B error code?

The most common causes of B1B2B include: Wiring harness damage; Seat belt pretensioner malfunction; Short circuit in the circuit; Problems with the SRS control unit.

How do I fix a B1B2B diagnostic trouble code?

To fix B1B2B: Check the wiring harness for damage. Diagnose seat belt pretensioner. Check the circuit for short circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1B2B?

Limited driving only, diagnose soon

How much does it cost to fix B1B2B?

The estimated repair cost for B1B2B is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat