Engine Temperature Sensor High or Low
The engine temperature sensor is reporting out-of-range values.
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What it means (plain English)
The engine temperature sensor might see temperatures that are way too hot or too cold, which can lead to improper engine performance or cooling issues.
What the computer is actually seeing
The engine computer expects the temperature to be between 190°F and 220°F (88°C to 104°C). If it sees anything lower than 170°F (77°C) or higher than 230°F (110°C), it triggers the code.
What a healthy reading looks like
Normal operation should show engine coolant temperature between 190°F and 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 coolant level; must be at recommended level. If low, top off and retest.
- 22. Inspect the wiring and connectors at the engine temperature sensor for corrosion, damage, or loose connections. Fix as needed.
- 33. Use a scan tool to read actual engine coolant temperature. Compare to the expected values. If it's outside the range, replace the sensor.
- 44. If the sensor reads normal, test the ECM with a diagnostics tool to check for faults or failures in the control module.
Common causes
- Faulty engine temperature sensor
- Wiring issues or short circuits in the sensor circuit
- Coolant system problems such as low coolant level or leaks
- Faulty engine control module (ECM)
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's usually drivable, but monitor the temperature gauge closely. If it overheats, stop immediately.
Will this code come back after clearing?
If the sensor is faulty or there's another issue, yes, it will likely return.
Why does this code appear with other codes?
Often, multiple sensor failures occur due to wiring issues or systematic failures that affect multiple systems.
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