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

P0480

Cooling Fan 1 Control Circuit

Cooling Fan 1 Control Circuit: the control circuit has an electrical fault. Reduced cooling-fan control can let the engine or A/C condenser overheat.

SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number4 / 80

Possible causes

  • Fan relay failed high
  • Fan motor seized or open medium

Inspection / repair

  • Difficulty: medium
  • DIY: possible
  • Estimated cost: 60–600 €
  • Estimated time: 0.5–3 h
  • Component: cooling fan relay
  • Component: cooling fan motor
  • Component: fan wiring
  • 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