C0265
System
Chassis (ABS)
Scanner required
Full-system scanner (engine, ABS, SRS, transmission, service resets)

EBCM Motor Relay Circuit

Understand C0265, common causes, and the right TOPDON scanner to diagnose it.

GM-style ABS pump motor relay circuit fault.

Common symptoms

  • ABS light
  • Hard pedal

Typical causes

  • Failed relay in EBCM
  • Pump motor seized
  • Low voltage

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 C0265 with a basic code reader?
C0265 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 C0265?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.