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coolant temperature sensor? or thermostat?

Old 03-18-2012, 12:15 AM
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Default coolant temperature sensor? or thermostat?

my check engine light came on, so after goin to autozone, it was either one of 3 possible things, all related to coolant/cooling.. the guy said, coolant level may be low, thermostat may be bad, or coolant temperature sensor may be bad.

my car hasnt been overheating at all, and i have plenty of coolant in my reserve tank, so that eliminates those two and leaves the coolant temp sensor i guess?? anyone replace this? or know what it does or how it will affect my car?
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Old 03-18-2012, 02:34 AM
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Did u replace your thermostat with a colder one. I replaced mine with 140 degree thermostat and It said the same thing I drove around a little more and went away ...but I ended up getting a higher thermostat anyway just incase







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Old 03-18-2012, 03:55 AM
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first what model do you have. and i would do both. the coolant sensor can get a chaulky past the will cause the sensor to malfuction. the thermostate can get slightly stuck open causing that paste to form. i would replace all the coolant. replaced the thermo and temp sensor.
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Old 03-18-2012, 12:28 PM
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I haven't replaced anything. All is still original stuff and it's for my TC. But I guess I will look into those parts then
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Old 03-18-2012, 12:59 PM
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and where exactly is the coolant sensor? i was just checking levels of coolant in my car and im pretty sure i know where its located (has a black cap on it)
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Old 03-19-2012, 03:31 PM
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it's not a reserve tank, it's an OVERFLOW tank, meaning too much coolant when not needed... which means you do have enough coolant still lol.

as for the sensor, i would advise going to the "service manual" section on this site, it will give u diagnosis / servicing instructions on parts of the car.
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Old 03-19-2012, 10:59 PM
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decent!
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Old 05-05-2015, 11:09 PM
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My 2008 XD is running great but I have a problem and think it may be the "coolant temperature sensor. The red temp light comes on blinking and then stays solid for a bit and then blinks and then goes off. During this time the AC air stops being ice cold and blows out like a fan would. Then when the light goes out, the AC picks back up and blows cold. Then a few 100 feet down the road it does it again. The car is not overheating. It has a new waterpump and thermostat. Could it be the CTS?
Any advice is surely welcomed. Also I could not find the service manuel section on this site?


Thanks
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Old 05-06-2015, 01:03 AM
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I did but I put exactly what was in it before.
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