B0012 critical

Driver Seatbelt Pretensioner Deployment Control

The B0012 code means the vehicle's onboard diagnostic system has detected: Driver Seatbelt Pretensioner Deployment Control. This is a critical severity code.

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Keep driving?
No -- stop driving
DIY difficulty
hard
Estimated cost
$200 - $600 (parts and labor)
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Common Symptoms

  • Airbag warning light on
  • SRS fault code stored
  • Seatbelt pretensioner malfunction
  • Warning chime at ignition
  • Failed vehicle safety inspection

Probable Causes (Ranked by Likelihood)

  • Faulty driver seatbelt pretensioner Very High
  • Damaged wiring to seatbelt pretensioner High
  • Corroded connector at B-pillar Moderate
  • SRS control module fault Moderate
  • Previous collision with unreplaced pretensioner Low

Step-by-Step Diagnostic Procedure

  1. Scan SRS system for all DTCs

  2. Inspect driver seatbelt pretensioner connector at B-pillar

  3. Check wiring harness from SRS module to pretensioner

  4. Measure pretensioner squib resistance

  5. Verify pretensioner has not been previously deployed

Frequently Asked Questions

What is a seatbelt pretensioner?

A seatbelt pretensioner is a device that tightens the seatbelt during a crash to remove slack and hold the occupant firmly in position before the airbag deploys.

Can a pretensioner be reused after deployment?

No. Once a seatbelt pretensioner has deployed (fired), it must be replaced. It is a one-time-use device similar to an airbag.

Will this affect my seatbelt function?

The seatbelt will still lock and restrain you normally, but the pretensioner will not fire during a collision, reducing the effectiveness of the overall restraint system.

Sources

This page is built from documented references. Verify against your own service info before repair work.

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