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!

Powertrain generic / SAE

P2CE3

Intake Air Heater C Circuit Low

The control circuit of intake air heater C reports a circuit low condition. Cold-start preheating cannot be commanded as expected.

SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberC / E3

Possible causes

  • Control wire shorted to ground high
  • Heater element shorted medium
  • Connector pins corroded - high contact resistance low

Inspection / repair

  • Difficulty: easy
  • DIY: possible
  • Estimated cost: 80–400 €
  • Estimated time: 0.5–2 h
  • Component: intake air heater c
  • Component: wiring harness
  • Component: ecm
  • MIL / check engine light
  • emissions-relevant
  • drive cycle required

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