OBD-II reference

All 9.533 generic OBD-II codes, explained in detail.

Causes, inspection steps and sources — a comprehensive DIY archive. Created and maintained with love for the detail. Good luck and have fun!

Body generic / SAE

B0051

Driver Frontal Deployment Control Open

The SRS module has detected an open circuit in the driver frontal airbag deployment loop. Resistance is above the upper threshold, indicating broken wiring or a disconnected igniter.

SystemBody
Typegeneric / SAE
GroupB0
Range / number– / 51

Possible causes

  • Clock spring conductor broken high
  • Airbag connector not fully seated medium
  • Wiring open between module and squib low

Symptoms

  • Warning light or symbol related to the affected system
  • Comfort or safety function impaired

Inspection / repair

  • Difficulty: hard
  • DIY: shop recommended
  • Estimated cost: 200–1200 €
  • Estimated time: 1–3 h
  • Component: driver airbag module
  • Component: clock spring
  • Component: srs wiring
  • Component: srs control module

Sources

References

How to read OBD-II codes

The first letter names the vehicle system, the second digit distinguishes generic from manufacturer-specific, the remaining digits group fault area and number.

PPowertrain: engine, transmission, emissions
BBody: chassis trim, comfort, interior
CChassis: suspension, brakes, steering
UNetwork: CAN, control modules, communication