WoodyS

Every morning, when my wife starts her TT, the Engine coolant temperature/level indication symbol illuminates. After she drives a few blocks, the symbol goes off.

The coolant level in the expansion tank is well above the minimum. Since the engine is cold, it obviously is not a high temp indication.

I suspect a faulty level sensor. Do the level sensors have a history of failures?

WoodyS
2000 TT quattro
40k miles

TTschwing

With some sadpaper on a stick or some other rig. The contacts that trigger that are in the bottle a few inches down from the cap. Easy to access. A little corrosion will hinder conductance, particularly in the cold. A replacement bottle with brand new contacts is pretty cheap though..

Kinetic0510

coolant temp sensor needs to be replaced. It's not located anywhere near the expansion tank so do a search on this forum for walk through guides on how to replace it. It's simply a $6 part at your local vw or audi dealer and VERY easy to install (try to go vw dealer if at all possible). Here's the part #'s:

059 919 501A (temp sensor / green plug)
N 903 168 02 (sensor o-ring)

WoodyS

I see nothing in my tank except for two slim wire rods (electrodes?).

WoodyS

Thanks for the part number reference and the suggestion of the VW dealer. I do everything in my power to avoid the Audi dealer (who wanted $250 to change the Haldex oil and filter).

TTschwing

Those are them...

WoodyS

After making my last post, I made my best effort at cleaning the electrodes with an old toothbrush. I started the car and got no "thermometer" display. Perhaps that did it. I'll keep my fingers crossed. Thanks for your help.

Kinetic0510

for $120. That included the haldex service, cabin filter, air filter, complete oil change, oil filter, basic fluids, and simple inspection.

And I've even heard the dealer charges upwards to $80-90 flat rate to replace the simply coolant temp sensor. It amazes me how dealer shops stay in business.

Rocky-in-Connecticut

40k service at the dealer also includes new sprk plugs.

Kinetic0510

my next set are due at 60k.