Engine Temperature High
The engine temperature is too high, indicating potential overheating.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The engine's computer is detecting that the engine cooling temperature is above the normal operating range, usually over 230°F (110°C).
What the computer is actually seeing
The Engine Control Module (ECM) sees a signal from the coolant temperature sensor that is higher than the expected threshold.
What a healthy reading looks like
Normal coolant temperature should be between 190°F to 220°F (88°C to 104°C).
Guided diagnostic — the DiagCoach way
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.
- 11. Check the coolant level in the reservoir. If low, fill to the recommended level. Decision: If coolant is low, refill and monitor; if not, proceed.
- 22. Inspect for visible coolant leaks around the engine and radiator. Decision: If a leak is found, repair and check for code return; if not, proceed.
- 33. Verify operation of the thermostat by checking if the upper radiator hose heats up as the engine warms up. Decision: If the hose does not heat up, replace the thermostat; if it does heat up, proceed.
- 44. Test the coolant temperature sensor with a multimeter. Compare the resistance reading at different temperatures to the manufacturer's specifications. Decision: If the sensor is out of spec, replace it; if it reads correctly, inspect for other issues in the cooling system.
Common causes
- Low coolant level
- Coolant leak
- Thermostat stuck closed
- Faulty coolant temperature sensor
- Air in the cooling system
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Not advisable. Engine overheating can lead to serious damage.
Will this code come back after clearing?
If the underlying issue isn't fixed, yes, it'll return.
Why might this code pair with SPN 119?
SPN 119 often indicates a related issue with engine coolant temperature sensor range.
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