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

P0217

Engine Coolant Over Temperature Condition

Coolant temperature exceeded the safe maximum. Engine overheating event detected — risk of head gasket damage or seizure.

SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number2 / 17

Possible causes

  • Thermostat stuck closed high
  • Low coolant level (leak) high
  • Water pump failed medium

Symptoms

  • Check engine light on
  • Cooling fan runs constantly or not at all
  • Cabin heater weak or excessively hot
  • Possible long warm-up time or hard cold start

Inspection / repair

  • Difficulty: medium
  • DIY: possible
  • Estimated cost: 50–2000 €
  • Estimated time: 0.5–8 h
  • Component: cooling system
  • Component: thermostat
  • Component: water pump
  • Component: radiator
  • MIL / check engine light
  • emissions-relevant
  • 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