Where is this sensor you are talking about located? I think it got wet last night while driving through a tunder storm. If you can please let me know, thank you.mbhmustang1998 said:I remember a few years ago when i got an underbody wash on my car the low coolant light came on. I checked it and added the appropiate coolant. Light still came back on. I pulled the plug going to the sensor and it had water in it. So i left it disconnected so it could dry out and it fixed the problem. It did it again when i powerwashed the engine off. I had to do the same routine. Now i keep the water away from there and either the sensor died, lol or just i am keeping it dry now. Not saying this is your problem just those sensors are very picky.