Hello,
I have a 98 A4 Tdi with 90K on the clock. Recently, a flashing red light (water with thermostat in it) comes on when the engine is warmed up - after about 10mins. When I inspect the coolant reservoir - it is full and a orange color. The temp remains in the middle at 90.

History:
Red light came on, upon inspection - reservior was empty - filled up with 50/50 normal coolant & water.
About two months later - same thing happened - again filled up with coolant & water.

Now - the light comes on - but the coolant level is up to the top!!

Has anyone else come across this or something similar?? Please help!!

Thnx,

A Novice!

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paul

Maybe a bad coolant level sensor at the bottom of the reservoir?

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2004 VW Touareg
2005.5 Audi A4
1997 Audi A4

Thanks!!
Will give it a go! Do you happen to know if its hard to get to replace or expensive?????

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paul

thats what I was thinking.

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[quote]ORIGINAL: A4 the Quattro

...let go of your cyber-boner.. lol

Wait a sec... you filled the reservior and it was empty 2 months later?

You may have a more serious problem than a faulty sensor.

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-Craig
Deleware Valley Audi Group

Yeahbut, I've seen the senser go bad and the coolant leak though the sensor, not the o ring but the sensor.

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[quote]ORIGINAL: A4 the Quattro

...let go of your cyber-boner.. lol

Thanks Guys - great inputs!

Yes, correct reservoir was empty after approx 2 months.

I am getting a quote from a dealer on Thursday for a new sensor and replacement - and will keep you posted.

Interesting to know the coolant may also leak through the sensor - as this may be whats causing it to go bad!

Also, it only happens about 75% of the time I'm driving and only when the engine is warmed up after about 10mins

Thnx,

Paul

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paul