A3 Temp gage

[Graham]

hey all, i have a 2000 A3 1.8T and the engine temperature gage only works intermittantly. does anybody know what could be the cause of the problem? Is it something i should be worried about? cheers:1zhelp:

[Marc97]

Could be as simple as a faulty sender or a bad connection in the engine bay at the sender unit.
Maybe one of our more experienced members could make a better suggestion.
Good luck with it.

[Graham]

cheers, will check the connections and keep you posted

[jak]

Usual answer is renew coolant temp sensor which sends signal to both guage and ecu.
Let us know how you get on

[stuart]

A very common problem on some VAG's is a "green" 4 pin temp switch, this may be your problem.

Stuart

[jak]

Yep,thats the one.Have changed before on last car -98a4avant(afn)but for over fueling problem. Like you say-common problem

[Graham]

cool, cheers guys, will check it out and let u know. thanks for the advicce:beerchug:

[yzfr1boy]

my a4 has been doing it 2 ,took sensor out today and the pins were not clean had corrosion on so cleaned it and put it back on, seems to be ok now

[Desdesigner]

my a4 has been doing it 2 ,took sensor out today and the pins were not clean had corrosion on so cleaned it and put it back on, seems to be ok now

I have a 2002 A4 with a tempremental guage. Sometimes its quarter the way up, somtimes at 50, somtimes in the correct position of 90 deg c. Is it safe to detach the sensor plug and have a look. Just curiouse about it upsetting the ECU.

Many Thanks!

[italianrat182]

i usually get me temp gage coming on if the coolant level is low. sound obvious but worth checking if you have a leak somewhere

[Desdesigner]

Is it safe just to unplug the sender whilst the car is off? Dont want to upset the ECU as I have bu**er all knowledge of cars. :(