OBD Guide
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B1B29

1st Row Driver Seat Belt Pretensioner Circuit High

B1B29 is an OBD-II diagnostic trouble code meaning: 1st Row Driver Seat Belt Pretensioner Circuit High. Common causes: open or short circuit in wiring harness, pretensioner squib malfunction. Estimated repair cost: $56–167.

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

Symptoms

  • SRS/airbag indicator is on
  • The safety system may not work in an accident
  • The error is stored in the memory of the control unit

Causes

  • Open or short circuit in wiring harness
  • Pretensioner squib malfunction
  • Corrosion of contacts in connectors
  • Problems with the SRS control unit
  • Mechanical damage to system components

How to Fix

  1. Diagnose the SRS system using a scanner
  2. Visually inspect the wiring harness and connectors
  3. Check pretensioner chain resistance
  4. If necessary, replace the pretensioner or wiring harness.
  5. Reset errors and check the system

Related codes

B1B28B1B2AB00A0

FAQ

What does the B1B29 code mean?

B1B29 is an OBD-II diagnostic trouble code that indicates: 1st Row Driver Seat Belt Pretensioner Circuit High

What causes a B1B29 error code?

The most common causes of B1B29 include: Open or short circuit in wiring harness; Pretensioner squib malfunction; Corrosion of contacts in connectors; Problems with the SRS control unit.

How do I fix a B1B29 diagnostic trouble code?

To fix B1B29: Diagnose the SRS system using a scanner. Visually inspect the wiring harness and connectors. Check pretensioner chain resistance. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1B29?

Do not drive — repair immediately

How much does it cost to fix B1B29?

The estimated repair cost for B1B29 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat