Symptoms of a failing Engine Coolant Temperature Sensor

Warning lights

In the car world, the malfunction indicator lights are commonly known as idiot lights. That’s to make them so simple that an idiot can understand that something is wrong. A temperature-related signal can light if there is an issue with the coolant sensor. You also might get a check engine warning light or, depending on the type of car you have, any other number of warning lights.

Overheating

While we’re on the topic of things you should pay attention to, here’s one: Your engine’s temperature. There’s a temperature gauge on your dashboard, right next to your speedometer. It should indicate your engine temperature being right in a happy zone. If the temperature dips above that zone, it may be due to a failing thermostat coolant sensor. Also, it means your engine is too hot, and that’s bad news. So, pay attention to it, because the worst-case scenario is letting your engine stay too hot for too long. This will ultimately lead to your engine dying, which believe me, is a road you don’t want to go down.

Poor performance

Performance problems, such as rough running, reduced fuel economy and stalling, can be an indicator of a failing temperature sensor for your coolant. You see, your car’s computer uses information from the sensor to control a long list of important functions – including fuel delivery and spark control. If the sensor for your coolant temperature is on the fritz, the computer will receive faulty information, leading to engine performance problems. And trust me, you don’t want that. It makes green lights a lot less fun.