B0100
System
Body (SRS)
Scanner required
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Electronic Front End Sensor 1 Performance

Understand B0100, common causes, and the right TOPDON scanner to diagnose it.

Front crash or impact sensor performance fault in supplemental restraint system.

Common symptoms

  • Airbag light on
  • SRS disabled

Typical causes

  • Front impact sensor fault
  • Wiring after minor collision
  • Sensor mounting

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 B0100 with a basic code reader?
B0100 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 B0100?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.