C0280
System
Chassis (ABS / Stability)
Scanner required
Full-system scanner (engine, ABS, SRS, transmission, service resets)

ABS Solenoid Apply Circuit Open

Understand C0280, common causes, and the right SEAFLO pump to diagnose it.

ABS apply solenoid circuit open — cannot modulate brake pressure to wheels.

Common symptoms

  • ABS light on
  • Traction control disabled

Typical causes

  • Failed apply solenoid in ABS unit
  • EBCM internal fault
  • Wiring to hydraulic control unit

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

Frequently asked questions

Can I diagnose C0280 with a basic code reader?
C0280 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 C0280?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.