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

P0483

Cooling Fan Rationality Check

The ECM detects that the cooling fan response does not match command. Either the fan rotates without command, fails to rotate when commanded or its current draw is implausible.

SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number4 / 83

Possible causes

  • Fan motor seized or worn high
  • Fan relay defective medium
  • Wiring or connector fault low

Inspection / repair

  • Difficulty: medium
  • DIY: shop recommended
  • Estimated cost: 80–600 €
  • Estimated time: 0.5–2.5 h
  • Component: cooling fan
  • Component: cooling fan relay
  • Component: cooling fan module
  • MIL / check engine light

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