Drive with caution — fix soon.
This code means the coolant temperature sensor is functioning but reporting values that don't make sense to the computer, such as warming up too slowly or reading outside the expected range. Common causes include a stuck thermostat, a failing ECT sensor, or low coolant, and fixes often involve replacing the thermostat or sensor. It's a moderate code that's usually straightforward to diagnose and repair.
$100 – $350
Varies by vehicle and root cause.
Usually yes for short trips, since the sensor is reading off rather than dead. You might notice slower warm-up or worse mileage, but it's generally safe. Because it ties into cooling, still watch your gauge and get it looked at within a few days.
Repairs typically run $100 to $350. A sensor replacement is on the lower end, while a stuck thermostat or coolant system work raises the cost. The exact figure depends on which component is the real cause.
It's moderate. The repair is usually manageable, but inaccurate coolant readings can affect fuel mixture and overheating protection. Fixing it keeps your engine running at the right temperature.
Yes, that's one of the most common causes. A thermostat stuck open keeps the engine from warming up properly, so the coolant temperature never reaches the range the computer expects. Replacing the thermostat often clears the code in that situation.