vems iat issue

[cooperquattro]

My iat seems to be stuck at -9`c,I am using 1.8t ntc type sensor with 2254 patch,if I try the old ptc sensor I get 17`c,but using either the iat or mat reading doesn't move,removing the sensor I get _40`c(which is correct)
Thanks

[A80Avant]

Try another sensor. If its ok then its just the sensor. They are very cheap. I haven't heard of the module in the ecu to break down

[cooperquattro]

Cheers vas will try another sensor,I allready tryed 2 aby sensors but they didn't work,will try a new1.8 one

[Jamo]

You can't switch sensors between ntc and ptc with VEMS on the fly, only 1 sensor type can be active at a given point in time, there's a resistor on the motherboard that governs this so the ABY ones wont work. You need to try a new sensor like Vas says and check that your using the patch file values in the ecu settings

[cooperquattro]

Ok cool,I am sure the ecu is set up for ntc(as in resistor on the board)that's probably why the ptc is not working,I will try a new one,I used 2254 patch
Is there a prefered make to use??ie Bosch etc

[A80Avant]

Yes indeed. I thought you knew that.

[Jamo]

Ok cool,I am sure the ecu is set up for ntc(as in resistor on the board)that's probably why the ptc is not working,I will try a new one,I used 2254 patch
Is there a prefered make to use??ie Bosch etc

You should be using 2252/256 for a Bosch 1.8T NTC

[cooperquattro]

Yes sorry.thats the patch,just couldn't remember the exact no.
Do you guys know the Bosch part no. Thanks Martyn