B1015
System
Supplemental Restraint (Airbag)
Scanner required
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Driver Airbag Loop Circuit Failure

Understand B1015, common causes, and the right TOPDON scanner to diagnose it.

Open or high resistance in driver airbag squib circuit.

Common symptoms

  • Airbag warning light
  • Horn/cruise issues common with clock spring

Typical causes

  • Clock spring open
  • Airbag module internal open
  • Connector not seated after steering work

What scanner do you need?

Full-system scanner (engine, ABS, SRS, transmission, service resets)

Use live data and freeze frame to confirm the fault before replacing parts. ABS, SRS, and network U-codes usually require a full-system scanner.

Diagnostic tips

  • Record freeze frame data when the code first sets
  • Clear the code only after fixing the root cause
  • Check for related pending codes that point to a common issue
  • Verify battery voltage is above 12.4V before chasing sensor codes

Recommended TOPDON scanners

Frequently asked questions

Can I diagnose B1015 with a basic code reader?
B1015 may set in the engine module, but related diagnostics often benefit from an enhanced or full-system scanner with live data and freeze frame.
Is it safe to drive with B1015?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.