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

C0912

TPMS Initiator Front Circuit Malfunction

The TPMS module has detected an electrical fault in the front low-frequency initiator (used to wake and locate sensors). Position learning of the front sensors fails.

SystemChassis
Typegeneric / SAE
GroupC0
Range / number9 / 12

Possible causes

  • LF initiator coil failed high
  • Wiring or connector fault 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: 120–500 €
  • Estimated time: 0.5–2 h
  • Component: tpms initiator
  • Component: tpms module
  • Component: initiator 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