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

C0500

Anti-lock Brake System Disabled

A general status code indicating that ABS function has been disabled by the brake control module. It is set in addition to the underlying root-cause code that disabled ABS.

SystemChassis
Typegeneric / SAE
GroupC0
Range / number5 / 00

Possible causes

  • Underlying ABS fault disables function high
  • Communication bus fault to ABS module medium

Symptoms

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

Inspection / repair

  • Difficulty: medium
  • DIY: shop recommended
  • Estimated cost: 50–1200 €
  • Estimated time: 0.3–4 h
  • Component: abs control module
  • Component: brake system
  • Component: communication bus

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