Engine Cooling System Temperature
Indicates the current temperature of the engine coolant.
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 is measuring how hot the coolant is to prevent overheating, which can cause severe engine damage.
What the computer is actually seeing
The ECM is looking for the engine coolant temperature to be within a range of 180°F to 220°F (82°C to 104°C). If it goes above that, it triggers a fault.
What a healthy reading looks like
Normal engine coolant temperature is between 180°F and 220°F (82°C and 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.
- 1Check coolant level: Ensure it’s at the recommended level. If low, top off with the correct mix and retest.
- 2Inspect wiring and connectors to the coolant temperature sensor for damage or corrosion; repair as needed.
- 3Verify the coolant temperature sensor reading with a scan tool; it should fall between 180°F and 220°F (82°C to 104°C). If it's outside this range, replace the sensor.
- 4Clear the fault codes and run the engine to see if the code returns. If it does, consider checking the ECM calibration or internal issues.
Common causes
- Faulty coolant temperature sensor
- Wiring issues or corrosion in the connector
- Low coolant level or leaks
- Corrupted ECM calibration
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's generally safe to drive, but you should monitor the temperature and get it fixed soon to avoid potential overheating.
Will this code come back after clearing?
If the underlying issue isn't resolved, yes, it will likely return.
Why do I keep seeing this with SPN 110?
SPN 110 is often related as it also deals with engine temperature, indicating a broader issue in the cooling system.
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