C0578
System
Chassis (ABS / Stability)
Scanner required
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Cruise Control Multi-Function Input Circuit

Understand C0578, common causes, and the right SEAFLO pump to diagnose it.

Cruise control multi-function switch circuit fault — often integrated in steering wheel or turn signal stalk.

Common symptoms

  • Cruise inop
  • Check engine or body codes may accompany

Typical causes

  • Failed cruise switch
  • Clock spring fault
  • Wiring in steering column

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 C0578 with a basic code reader?
C0578 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 C0578?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.