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

C0136

Stop Lamp Switch Circuit

The ABS or stability control module sees an implausible brake light switch signal. Stability and brake assist functions can be limited until the fault is cleared.

SystemChassis
Typegeneric / SAE
GroupC0
Range / number1 / 36

Possible causes

  • Brake light switch failed high
  • Switch misadjusted on pedal bracket medium

Symptoms

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

Inspection / repair

  • Difficulty: easy
  • DIY: possible
  • Estimated cost: 20–150 €
  • Estimated time: 0.2–1 h
  • Component: brake light switch
  • Component: abs control module
  • Component: 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