OBD Guide
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B1B2E

1st Row Passenger Seat Belt Pretensioner Circuit Open

B1B2E is an OBD-II diagnostic trouble code meaning: 1st Row Passenger Seat Belt Pretensioner Circuit Open. Common causes: broken or damaged pretensioner circuit wiring, seat belt pretensioner malfunction. Estimated repair cost: $56–167.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)

Symptoms

  • The passive safety system fault indicator is on
  • Seat belt pretensioner does not engage in an accident
  • Error B1B2E in the diagnostic scanner memory

Causes

  • Broken or damaged pretensioner circuit wiring
  • Seat belt pretensioner malfunction
  • Problems with the restraint system control unit
  • Corrosion or poor contact in connectors

How to Fix

  1. Check the integrity of the pretensioner circuit wiring
  2. Check connectors for corrosion or damage
  3. Check pretensioner chain resistance
  4. Replace seat belt pretensioner if necessary
  5. Clean or replace connectors if corroded
  6. Reset the error and check the system

Related codes

B1B2FB1B30B1B31

FAQ

What does the B1B2E code mean?

B1B2E is an OBD-II diagnostic trouble code that indicates: 1st Row Passenger Seat Belt Pretensioner Circuit Open

What causes a B1B2E error code?

The most common causes of B1B2E include: Broken or damaged pretensioner circuit wiring; Seat belt pretensioner malfunction; Problems with the restraint system control unit; Corrosion or poor contact in connectors.

How do I fix a B1B2E diagnostic trouble code?

To fix B1B2E: Check the integrity of the pretensioner circuit wiring. Check connectors for corrosion or damage. Check pretensioner chain resistance. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1B2E?

Do not drive — repair immediately

How much does it cost to fix B1B2E?

The estimated repair cost for B1B2E is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat