OBD-II reference

All 9.533 generic OBD-II codes, explained in detail.

Causes, inspection steps and sources — a comprehensive DIY archive. Created and maintained with love for the detail. Good luck and have fun!

Chassis generic / SAE

C0265

EBCM Relay Circuit

The Electronic Brake Control Module has detected a fault in its main supply relay circuit. Without proper relay supply the EBCM cannot operate the hydraulic unit and ABS as well as stability control are disabled.

SystemChassis
Typegeneric / SAE
GroupC0
Range / number2 / 65

Possible causes

  • EBCM relay failed high
  • Internal EBCM fault (relay integrated) medium
  • Power supply wiring or fuse fault low

Symptoms

  • ABS warning light on
  • ESC/stability control deactivated
  • Possible reduced brake assist
  • Speedometer may behave erratically

Inspection / repair

  • Difficulty: hard
  • DIY: shop recommended
  • Estimated cost: 200–1500 €
  • Estimated time: 0.5–3 h
  • Component: ebcm relay
  • Component: ebcm module
  • Component: power supply wiring

Sources

References

How to read OBD-II codes

The first letter names the vehicle system, the second digit distinguishes generic from manufacturer-specific, the remaining digits group fault area and number.

PPowertrain: engine, transmission, emissions
BBody: chassis trim, comfort, interior
CChassis: suspension, brakes, steering
UNetwork: CAN, control modules, communication