Fault-Code Library · Cooling system
P0217: Engine coolant over-temperature condition
The engine controller recorded coolant temperature above its safe operating threshold.
Common symptoms
- •Temperature warning
- •Reduced power
- •Cooling fans at high speed
- •Coolant loss
Likely causes
- •Low coolant or leak
- •Failed water pump
- •Thermostat stuck closed
- •Fan or sensor fault
First checks
- •Stop and allow the engine to cool
- •Pressure-test for leaks
- •Check pump flow, thermostat, fan command, and sensor plausibility
Important
Do not open a hot cooling system or continue driving; overheating can distort the cylinder head and damage the engine.
A fault code identifies a detected condition, not a failed part. Confirm manufacturer-specific subcodes and live data.
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