B1180
System
Supplemental Restraint (Airbag)
Scanner required
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Fuel Level Sensor Circuit — SRS Link

Understand B1180, common causes, and the right TOPDON scanner to diagnose it.

Fuel level input to SRS module implausible — some platforms use fuel level for crash algorithm.

Common symptoms

  • Airbag light on
  • Fuel gauge erratic

Typical causes

  • Fuel level sensor fault
  • Low fuel sender circuit
  • Connector at fuel pump module

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 B1180 with a basic code reader?
B1180 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 B1180?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.