Engine Temperature Sensor
The engine temperature sensor is reporting abnormal readings.
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What it means (plain English)
The engine temperature sensor measures how hot the coolant is. If it's off, the computer thinks something's wrong with how hot the engine gets.
What the computer is actually seeing
The engine control unit receives signals from the temperature sensor indicating coolant temp. Expected readings range from 190°F to 220°F (88°C to 104°C) when operating normally.
What a healthy reading looks like
Coolant temperature between 190°F (88°C) and 220°F (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 coolant level. Make sure it's within acceptable range. If low, add coolant and retest.
- 22. Inspect wiring and connectors for damage or corrosion. Repair any issues found.
- 33. Use a scan tool to check the actual temperature reading from the engine temperature sensor. If it's outside of 190°F to 220°F, proceed to next step.
- 44. Test the engine temperature sensor with a multimeter. Compare the resistance readings to values in the service manual.
- 55. If the sensor is faulty, replace it. If readings are normal but the code persists, check the ECM for updates or faults.
Common causes
- Faulty temperature sensor
- Wiring issues
- Coolant level too low
- Bad engine thermostat
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderate severity; you can drive but should fix it soon to avoid overheating issues.
Will this code come back after repairs?
If all repairs are done properly and the system is functioning, the code shouldn’t return.
Why does this code show up with other sensor codes?
Multiple sensor codes can trigger if the engine struggles to reach or maintain operational temperatures.
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