P0217Engine Coolant Over Temperature Condition
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- P0217 is a condition code: the engine module reports that coolant temperature has passed a protection threshold. The limit and the reaction depend on the manufacturer – Saab's 2.2 diesel sets it at 120 °C for over 10 s, limits fuel quantity and suspends EGR and boost diagnostics until the temperature drops; heavy-duty diesels cut power sharply and may shut down; Ford petrol engines use their own code P1299 and cut fuel to individual cylinders. Whether the warning light comes on varies, because CARB exempts overheat protection that only engages once the gauge reads red. Usual causes are low coolant, a thermostat stuck closed, a failed fan or water pump – but Ford traced some cases to a faulty coolant sensor or harness.
- What you may notice
- Temperature gauge in the red, overheat warning
- Loss of power, limp mode, cylinders possibly shut off
- Air conditioning switches off
- Steam or coolant smell, coolant loss
- Likely causes
- LikelyLow coolant (leak, head gasket)
- LikelyThermostat stuck closed
- PossibleRadiator fan, fan clutch or water pump faulty, radiator clogged
- PossibleCoolant temperature sensor or harness faulty (false reading)
- RareExtreme load (towing, gradient, heat) with an intact cooling system
- Repair
- Medium · Often possible to do yourself.Typical cost: €30 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.