Engine Coolant Temperature Sensor 2
Engine Coolant Temperature Sensor 2 signal out of range.
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What it means (plain English)
The engine has a second coolant temperature sensor that measures how hot the coolant is. If it sends a reading that’s too high or too low, it triggers this code, which means the computer thinks something is wrong with the engine temperature.
What the computer is actually seeing
The computer expects the engine coolant temperature to fall between 175°F (80°C) and 210°F (99°C) during normal operation. If it sees values outside this range for more than a set time, it sets the code.
What a healthy reading looks like
Coolant temperature should be between 175°F (80°C) and 210°F (99°C) when the engine is running and at operating temperature.
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; top off if low and run the engine to see if the code returns.
- 22. Inspect wiring and connectors at the coolant temperature sensor 2 for signs of damage or corrosion.
- 33. Use a multimeter to check the resistance of the coolant temperature sensor; it should match expected values for its temperature range.
- 44. If the sensor is faulty (out of range readings), replace it and clear the code then retest.
- 55. If the issue persists, check the engine temperature with a scan tool and compare it with the sensor reading.
Common causes
- Faulty engine coolant temperature sensor 2
- Wiring issues or corroded connectors
- Low coolant level
- Thermostat stuck open or closed
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's generally drivable but monitor engine temperature closely; it could lead to overheating.
Will this code come back after I clear it?
If the root cause isn’t fixed, yes, it will likely return.
Why does this code sometimes pair with SPN 4114?
SPN 4114 is typically related to the first coolant temperature sensor; both can fail or show related issues.
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