CAR OBD CODES
B0051body

B0051 – Driver Seatbelt Pretensioner Deployment Control

What does B0051 mean?

B0051 is a generic (standardized) OBD-II diagnostic trouble code in the Body category. Its definition is: Driver Seatbelt Pretensioner Deployment Control. Body codes (B-codes) cover vehicle body functions including airbags, seat belts, power windows, lighting, horn, wipers, and more.

Code breakdown

SystemB — Body
TypeGeneric (standardized SAE / OBD-II code — same meaning across most manufacturers)

Common symptoms

  • A warning light related to the affected system may be on (e.g. airbag/SRS light)
  • The specific body feature (lighting, wipers, windows, restraints) may not work correctly
  • In some cases the fault is stored without any visible symptom

How to diagnose

  1. 1Scan the body control module (BCM) and any related module to confirm the stored code.
  2. 2Check the wiring and connectors for the affected circuit, including grounds.
  3. 3For restraint (airbag) codes, treat the system with care and consider professional service.
  4. 4Verify the component operates correctly and matches specification.
  5. 5Clear the code and re-test the affected feature.

Severity varies by code and vehicle. Some codes are minor, while others can affect drivability or safety. When in doubt, consult a qualified technician.

Related codes

B0020B0022B0028B0030B0052B0053B0057B0070
Back to all Body Codes →

This information is provided for general reference only and may vary by manufacturer, model, and year. It is not a substitute for professional diagnosis or repair.