Maff1976
Guest
simonirwin
Guest
Hi,
I've had a similar problem to this. My temperature gauge has started going down to nothing, then other days it will read 90 as usual. As suggested earlier on this thread I have brought the signal 51 up on the climate control panel. I got the engine up to temperature watching this display, and it went to around about the 90 mark. So the sensor must be working fine but I have heard talk of there being 2 temperature sensors. Is the signal read on the climate control screen the same as the signal which the gauge shows?
It's a Leon Cupra with a 1.8T AUQ engine.
I've had a similar problem to this. My temperature gauge has started going down to nothing, then other days it will read 90 as usual. As suggested earlier on this thread I have brought the signal 51 up on the climate control panel. I got the engine up to temperature watching this display, and it went to around about the 90 mark. So the sensor must be working fine but I have heard talk of there being 2 temperature sensors. Is the signal read on the climate control screen the same as the signal which the gauge shows?
It's a Leon Cupra with a 1.8T AUQ engine.
simonirwin
Guest
Sorry to be a pain, but if it was the sensor which was faulty surely I wouldn't see the correct temperature up on the climate control screen?
There is 2 sensors in the unit one for the ECU the one you can read on the climate screen, and the other for the dash.
You can get the sensor for £10 on ebay, and changing it is simple.
Use this guide if the same on yours
http://uk-mkivs.net/forums/t/147822.aspx
Use this guide if the same on yours
http://uk-mkivs.net/forums/t/147822.aspx
simonirwin
Guest
Yep I've already had the sensor out to check the connections at that end. Piece of cake. I took your advice and ordered one on ebay for £8.75 including postage. Less than half the price on euro car parts!
Just to add to this (and hopefully save others spending £25 on a new sender which might not even need changing 
)
I've just changed the green top sensor for a genuine VW one due to a wandering gauge whilst the climate control display was showing 90. Strangely the gauge is still wandering but not as much (i.e. it only drops to 85 rather than 70-75). I'd have thought if the sensor was the original problem a new one would have solved it completely, and if it wasn't then there would have been no change in 'symptoms' at all
Do I need a whole new thermostat or is there another sensor within it? (Have read conflicting things on here).
And where does the ECU gets it's signal from? As long as it's being told the temperature is a constant 90 there shouldn't be any other problems anyway I'd have thought
)I've just changed the green top sensor for a genuine VW one due to a wandering gauge whilst the climate control display was showing 90. Strangely the gauge is still wandering but not as much (i.e. it only drops to 85 rather than 70-75). I'd have thought if the sensor was the original problem a new one would have solved it completely, and if it wasn't then there would have been no change in 'symptoms' at all
Do I need a whole new thermostat or is there another sensor within it? (Have read conflicting things on here).
And where does the ECU gets it's signal from? As long as it's being told the temperature is a constant 90 there shouldn't be any other problems anyway I'd have thought
Could be the thermostat yes and no, there is no other sensor.
And where does the ECU gets it's signal from? As long as it's being told the temperature is a constant 90 there shouldn't be any other problems anyway I'd have thought
It is getting it from the sensor you changed.
There are two signals sent one to the ECU and the other to the dash gauge.
when i first got it i changed sensor and thermostat as it had same prob then i changed the thermo again (twice) when i had the strange water loss probs !!
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