blackops

Question for you all again, on my new 2002 A4 that I just bought my temperature gauge has been acting weird at times.

There are times where it would seem to be operating and working properly. Start off all the way cold and as the car gets warm and I am driving it slowly creeps up to the middle safe temperature range.

However there are other times where sometimes it barely moves and it done on the cold portion of the guage. Like only move 1/4" or so. This is even in 60-70 degree weather. But then after I get out of the car and get back in from someplace it is working normal again.

Anyone have any ideas why it is doing that? I have no idea at all and not sure what could be the problem or where to look.

Thanks again.

sticks100a

I had a similar problem. I believe the possibilies, in order of difficulty to fix are: ratio/amount of antifreeze, lower ect sensor, upper (rear) ect sensor, thermostat, and fan controller (did not replace, so don't know how hard to fix). I replaced the lower ect sensor (requires replacement of coolant); upper ect sensor, and thermostat - thermostat replacement did the trick. Tech articles explain how to replace upper ect sensor, and thermostat. I am not sure whether there is a diy for the lower but it is easy.

Hope it helps.

kr964

You need new Coolant Temperature Sensor part# 059 919 501 A
I had the same problem on my Avant last year. It seemed to fix itself in winter but then it started acting up again.
No a big issue but hard to access on a V6 so I had my dealer replacing it (paid around $120).
http://www.pap-parts.com/prodinfo.as...=059+919+501+A

blackops

Thanks for the information much appreciated.
Will have to take a look into it.

Thanks

B6er

$7 part at Autozone, 16-20 at online vendors. (german parts snobs, please) and about 1/2 hour. DO not take to a dealer for this. It is too simple, especially on a 1.8T. Did it in my 04 1.8T Passat and My 04 1.8TQ A4. Works like a charm.