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

C0312

Ride Height Sensor Rear Right

The air suspension control module has detected a fault in the front left ride height sensor circuit. Without this signal the module cannot regulate suspension height and self-levelling is disabled.

SystemChassis
Typegeneric / SAE
GroupC0
Range / number3 / 12

Possible causes

  • Ride height sensor failed high
  • Sensor linkage broken or detached medium
  • Wiring or connector fault low

Symptoms

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

Inspection / repair

  • Difficulty: medium
  • DIY: possible
  • Estimated cost: 80–500 €
  • Estimated time: 0.5–2.5 h
  • Component: ride height sensor
  • Component: air suspension module
  • Component: sensor linkage

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