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

P2C3E

Fan 4 Control Circuit

The control circuit of cooling fan 4 reports a control circuit condition. Fan operation cannot be commanded reliably.

SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberC / 3E

Possible causes

  • Open in fan control wire high
  • Fan relay failed medium

Inspection / repair

  • Difficulty: medium
  • DIY: shop recommended
  • Estimated cost: 80–500 €
  • Estimated time: 0.5–3 h
  • Component: cooling fan 4
  • Component: fan relay 4
  • Component: ecm
  • MIL / check engine light
  • limp mode possible

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