Engine Coolant Temperature Too High

The engine is getting too hot, which can cause serious damage if not dealt with quickly.

The engine control unit (ECU) sees a coolant temperature reading above a critical threshold, typically above 220°F (104°C).

Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.

1. 11. Check coolant level in the reservoir; it should be at or above the 'full' line. If low, top up and test drive to see if code returns.
2. 22. Inspect for visible leaks around hoses, the radiator, and the water pump area. Repair any leaks found.
3. 33. Check the function of the thermostat by feeling the upper radiator hose; it should be warm or hot as temp rises. If not, replace the thermostat.
4. 44. Inspect the water pump for proper operation; look for leaks from the weep hole or unusual noise. Replace if necessary.
5. 55. Verify the operation of the radiator - check for blockage or damage. Clean or replace as needed.

• Low coolant level
• Coolant leaks
• Faulty thermostat
• Bad water pump
• Clogged radiator

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