Engine Coolant sensor problem

Hello,


the engine coolant temperature sensor is located by the thermostat here is guide to help walk you through the repair with diagrams below to show you how on your car.

https://www.2carpros.com/articles/coolant-temperature-sensor-cts-replacement

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

dont trust temp gauge in dash want to install 2nd temp gauge (mechanical) will not using temp sesor effect fans(electric) or the computer dont want a constant ckeck engine light. just relaced head gaskets lower intake gasket and plenum. torqed head bolts bit more than specified. brand new cheap duralast torqe wrench no where near 37 ft lbs at 44 ft lbs when checked with higher quality torque wrench have not been able to contact fel pro tech they shut down on thursday for the weekend . is there anything to look out for or just paranoid . thanks for your help em. bone

Remove the existing sending unit and install a "T". If you use an electric temp gauge, the temp probe is smaller than with a mechanical gauge.

hello, i have a 2003 impala with a 3.4 motor. i am having a problem with the cooling fans not working properly. i do have a genisys scanner with 2.0 software that i just got. i hook it up and watch the temp on there. the fans do not kick on until 230 degrees and it is both on high. if i run the ac they both will kick on high for a few seconds at 217-220 degrees and the temp lowers a little then the fans shut off. i have checked all the fuses and they are good. i have switched the relays and it doesnt seem to change anything. the will both also come on if i unplug the coolant temp sensor. what would you suggest to find out what i need to replace. thanks

i would start with replacing the thermostat. then monitor the temps.

Roy

update: when i went back to check the relays i pulled them out and noticed that it is supposed to have two 4 prong relays and one 5 prong relay in the center and all three of mine were 4 prong. i bought the correct relay this time and put it in and watch the temp and the low speed fans kicked on at 217 degrees as thet should and all is well now. i hope this might help someone else in the future.

who replaced the relays?? how did the wrong one get there???

Roy

they had to be like that when i bought the car. i bought it used. i switched them around with each other earlier to see if that made a difference and i didnt notice the prongs until i went back to check the voltage. oh i changed the thermostat a few moths ago thinking that might have been the problem but it didnt change anything.

are you sure you did not install the incorrect relay in the slot and the slot that took the other relay has the incorrect in there now??

Roy

how to remove @enstall low coolent sensor

all you have to do is remove the spring clip on the back side of it and disconnect the connector. you may want to flush the cooling system if it is full of mud. if not the sensor could go bad again in time.

no, i did check before i went and bought a new one. i now have 2 relays with 4 prongs and 1 new relay with 5 prongs

i got a 2002 chevy impala 3400 motor the cooling fan wasn't kicking on i replaced the heat sensor the fan kicks on now but after it gets half hot whats up with it

the only time the cooling fan turns on is when the engine get around 240 degrees or the AC is turned on. what do you mean by half way. is that on the temp gauge.

Engine Cooling problem
2001 Chevy Impala V8 Automatic 160000 miles

How do you change the coolant sensor?

I believe it just screws out. Check the new one for threads. If it has them, unscrew it and replace it with the new one.

Im having the same problem....
Where in the world is the ECT? I can not find it on this car.
Thank you so much!

I believe it will be under the passanger seat or on one of the kick pannels.

How do you replace a Engine Coolant Temperature sensor? The vehicle is a 3.8 liter V6.

Wait until engine is cold, then just unscrew it, and intall the new one, you wont loose too much coolant and you wont burn yourself!

How do I find out what the problem is with my car without putting so much money in it? My car has always had a little skip in it especially when going up a hill. Just recently it started skipping, stalling, cutting back, and sometimes even backfiring. I have replaced the crank sensor, egr valve, and coolant temp sensor. I also had a tune up on it last year.

Two things I would check first is spark and fuel pressure.

If OK, then check convertor. it may be clogged.

This year engine had intake gasket problems, so look for coolant near intake manifold.