Engine Coolant Temperature Sensor Performance
The engine coolant temperature sensor is reporting a performance issue.
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)
This code means the computer thinks the engine coolant temperature sensor isn't giving accurate temperature readings, which can mess with how the engine runs.
What the computer is actually seeing
The engine control module monitors the voltage signal from the coolant temperature sensor, which should vary between 0.5V (cold) and 4.5V (hot).
What a healthy reading looks like
Engine coolant temperature should be between 180°F and 220°F when the engine is at operating temperature, corresponding to sensor outputs around 1.5V to 3.5V.
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 the engine coolant level; top it off if low and clear the code.
- 2Inspect the wiring and connector for the coolant temperature sensor for damage or corrosion.
- 3Using a multimeter, measure the voltage at the coolant temperature sensor; it should be in the expected range at operating temperature.
- 4Compare the readings from a known good scanner with the vehicle's indicated temperature.
Common causes
- Faulty engine coolant temperature sensor
- Wiring issues or poor connections to the sensor
- Coolant level too low affecting temperature readings
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderate severity; you can drive but monitor the temperature gauge and avoid heavy loads until fixed.
Will this code come back after clearing?
If underlying issues are not fixed, yes, it will likely return after driving for a bit.
Why does this code pair with SPN 130?
Both codes relate to coolant temperature; one may point to the sensor performance and the other to the specific value being reported.
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