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OBD-II · Body (B)

B0070

Driver seat belt pretensioner circuit fault

What it means

The airbag control unit has found a problem in the circuit to the driver's seat belt pretensioner, the charge that tightens the belt in a crash.

Symptoms

  • Airbag warning light on

Likely causes, most likely first

Likely causes, most likely first
No.Cause
01loose or corroded connector under the driver's seat or at the B-pillar
02wiring damaged by seat movement
03pretensioner already fired in a previous crash
04faulty pretensioner

What to check, step by step

  1. 01Read the fault type from the airbag module
  2. 02Disconnect the battery and wait the specified time before touching airbag wiring
  3. 03Check connectors under the seat and at the belt reel/pillar
  4. 04Check whether the belt has already been fired (belt locked or shortened)
  5. 05Clear codes and confirm the airbag light goes out