OBD Guide
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B1B2F

1st Row Passenger Seat Belt Pretensioner Circuit Shorted Together

B1B2F is an OBD-II diagnostic trouble code meaning: 1st Row Passenger Seat Belt Pretensioner Circuit Shorted Together. Common causes: damage to the wiring harness (fraying, bending), short circuit in the pretensioner connector. Estimated repair cost: $17–222.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$17–222 (est.)

Symptoms

  • Airbag light (SRS) is on
  • A security system malfunction warning appears on the dashboard
  • Error B1B2F is stored in the ECU memory

Causes

  • Damage to the wiring harness (fraying, bending)
  • Short circuit in the pretensioner connector
  • Corrosion of contacts due to moisture ingress
  • Mechanical damage after an accident or repair
  • SRS ECU error (rare)

How to Fix

  1. Carry out diagnostics of the SRS system with a scanner to confirm the code
  2. Visually inspect the pretensioner wiring harness and connectors for damage.
  3. Check the continuity of the circuit with a multimeter (resistance, short circuit)
  4. If damage is detected, replace the harness or restore the insulation
  5. Clean connector contacts from oxides
  6. Erase the error and check that it does not reappear
  7. If necessary, replace the pretensioner or SRS ECU

Related codes

B1B30B1B31B1B2E

FAQ

What does the B1B2F code mean?

B1B2F is an OBD-II diagnostic trouble code that indicates: 1st Row Passenger Seat Belt Pretensioner Circuit Shorted Together

What causes a B1B2F error code?

The most common causes of B1B2F include: Damage to the wiring harness (fraying, bending); Short circuit in the pretensioner connector; Corrosion of contacts due to moisture ingress; Mechanical damage after an accident or repair.

How do I fix a B1B2F diagnostic trouble code?

To fix B1B2F: Carry out diagnostics of the SRS system with a scanner to confirm the code. Visually inspect the pretensioner wiring harness and connectors for damage.. Check the continuity of the circuit with a multimeter (resistance, short circuit). For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1B2F?

Do not drive — repair immediately

How much does it cost to fix B1B2F?

The estimated repair cost for B1B2F is $17–222. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat