Temp sensor?

[JoshGre]

Hi all

I'm new here, but I have tried using the search function, but can't find anyone with the same problem

The temp gauge in the car seems to have a mind of it's own.. It rarely moves from cold and then when it does, it has a mind of its own.. it can jump up to the temp the car should be, then back down to nothing, then back up to half way and back down to nothing..

But, the heaters stay warm, the car seems to run right...

The odd thing is, I changed the thermostat just to make sure, but as stupid as this sounds, I half knew in the back of my mind it wasn't that because of how erratic it is.. It can be less than a second it actually works for.. and in that second, it can go all the way to where it should, then back to nothing..

Before I replace the temp sensor, does anyone know if it's not that? Or have any other ideas?

BTW, All the other electronics in the car work without issue...


Thanks

 

[JamesBryan]

It's either been replaced with a faulty thermostat or the coolant hasn't been bled properly, so there could be some air in the system.

 

[JoshGre]

Thanks James, but as far as I am aware, there is no air in the system.. It was doing this before I replaced the thermostat.. So I'm guessing I'm not unlucky enough to have two faulty thermostats

 

[JamesBryan]

Ahh right, sounds like the coolant temp sensor then.

 

[Ben.Block]

That's what mine did when the cts went, check the wiring to it as well.

 

[JoshGre]

Thanks buddy, I'm going to pick a new temp sensor up today and give that a try.. Silly question, how much coolant did you lose when you did it?

 

[Ben.Block]

Couldn't say, When I've changed that or the thermostat I've always done a flush.

 

[dan112]

I did my cts a little while ago if you have the new sensor ready to screw in then you shouldn't lose much at all I lost maybe a couple of tablespoons full the cloth I had under it was hardly even wet I didn't even have to top it up

 

[joebloggz]

could be an air lock ,if not sensor.

 

[JoshGre]

Thanks everyone, replacing the sensor worked (now responds how it should)..

But now the car is not getting up to temp... I think this might be the aftermarket thermostat I ordered, so placed another order for a genuine one this time Hopefully that fixes it

Thanks again!

 

[Ben.Block]

A genuine one should open at 90degrees iirc. Does the aftermarket one indicate what temp it opens?

 

[JoshGre]

it states 89ºC, but not sure.... just rather put a genuine one in and go from there (hopefully that will cure it)

 

[scotty10]

Any update on this pal?

 

[JoshGre]

Any update on this pal?

Hey buddy, turns out it was two bent pins on the ECU, odd really, put a genuine stat on, straightened them out and put genuine coolant in and all was good