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Audi 80 warning lights - just the diode? - vibes
I have an Audi 80 Avant 1995, 163,000 on the clock. Serviced on the dot and all problems seen to on the dot. Today, on A66 over the Pennines, from Brough to the A1(M), on incline to summit, coolant/temperature warning came on, not constant, but blinking and faintly (on, next second off, next second on, and so on), temperature guage, however, at normal circa 90 degrees. After 1/4 mile pulled into layby. On opening bonnet, coolant level normal (was replaced recently), belt ok and pump ok (not hot and no leaks). Decided to continue and complete remaining 40 miles of journey. During, temperature guage normal, but warning light blinking on and off the whole way (most unnerving!), with one or two times went off for about ten seconds. I believe Audi's of this vintage are prone to electrical 'glitches' of which this was probably one. Comments???
Audi 80 warning lights - just the diode? - IanW3
The coolant level sensors on the 88-91 models are notorious for false alarms. You may have the same problem. The electrical plug can be removed from the underside of the expansion tank. If this cures the problem, then a new level switch is indicated. I took the opportunity to remove the expansion tank & clean it out thoroughly at the same time. Also, the metal pipe in one of the outlets was working it's way out, so was gently tapped back into place.

HTH,
Ian.
Audi 80 warning lights - just the diode? - vibes
Thanks, appreciate your reply. Local Bosch specialist (have just come back from there) agrees with you. Sensor gone (small round, black device) at bottom of tank, which is aprt of the tank, so need a new tank and connectors - including coolant and labour, about £70. Any further comments???
Audi 80 warning lights - just the diode? - dieselhead
Maybe just sediment in the sensor and/or dirty connections?. Worth washing it out and scraping terminals before buying a new tank perhaps?
Audi 80 warning lights - just the diode? - MGspannerman
If you dont want to pay Audi prices I can recommend www.vwaudibreakers.co.uk for parts. I got the part I needed for my 1994 A6 at an excellent price the next day after phoning in and paying by credit card.

MGs
Audi 80 warning lights - just the diode? - IanW
For future reference, you may like to try www.vagparts.com for genuine new Audi parts at a discount on dealer prices, where scrapyards are not suitable.

Needless to say, no relation.

Ian.
Audi 80 warning lights - just the diode? - vibes
Thanks, appreciated, but when I go there, 80 parts v few and far between.
Audi 80 warning lights - just the diode? - Mapmaker
Personally, I'd remove the offending light bulb from the dashboard - you don't need an Audi warning light system, it will only give you grief by the time it approaches its tenth birthday! I appreciate this may be viewed as shoddy working practice.

Audi 80 warning lights - just the diode? - vibes
Not what Bosch told me. I asked why have temperature warning light, when have temperature guage. Advised can be circumstances where lose coolant, this not reflected in temperature guage, but would be in temperature warning light - so you need it.
Audi 80 warning lights - just the diode? - Mapmaker
That is perfectly logical. But it doesn't allow for the famed unreliability of the Audi warning system - which is therefore best disabled otherwise you end up stopping now and again for no reason. I bet the next time the warning light comes on you won't pay it the slightest bit of attention - so don't bother fixing it!

As I said, it's the approach of a shoddy workman, but it will not give you any more trouble...