Drive with caution — fix soon.
This code means the engine computer detected a problem with the coolant temperature sensor circuit, which tells the system how hot your engine is running. Common fixes are replacing a faulty ECT sensor or repairing damaged wiring or a corroded connector. It's a common, generally affordable repair, but it matters because the coolant signal helps protect your engine from overheating.
$100 – $300
Varies by vehicle and root cause.
For short trips usually yes, but you shouldn't rely on it for long. Because this sensor helps manage cooling and overheating protection, a bad reading can hide an actual overheating problem. Watch your temperature gauge and get it checked promptly.
Most repairs land between $100 and $300. The sensor itself is inexpensive, but its location can make labor vary. Wiring-only repairs may cost less than a full sensor replacement.
It's moderate in severity. The repair is usually simple, but a faulty coolant signal can affect engine protection and fuel mixture. It's best not to leave it unfixed for long.
Indirectly, yes. If the computer can't read the true coolant temperature, it may not turn on the cooling fans when needed. That's why it's important to verify your actual coolant level and temperature while the code is present.