Question about 2005 Audi A3

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Okay, this car has been giving me alot of problems. Currently I am experiencing a starting problem with the vehicle. This seems to occur when the engine is warm, yet sometimes even then it starts perfectly. I have replaced several parts on the vehicle, had a recent major service etc. I have been told my fusebox needs replacing - its worn out and the one fuse has been burnt. Yet my friend took a look at it and it seems okay to him... Would a faulty fusebox cause such behaviour in the vehicle? I do not want to replace the fusebox, only to find the problem still persists. I have read up on several forums that it might be a faulty engine coolant temperature sensor or a bad check valve at the fuel pump. Is there any truth in this? Lastly, sometimes a light shows when I have started the vehicle. Its like a triangle with an exclamation mark in it, with a circular arrow around the triangle. Any suggestions would be appreciated.

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HI, I had the same problem about 6 months ago. Replaced the coolant sensor as you suggested and it fixed the problem. (about £15 from a local shop - just click the old one out and the new one in, reset the warning lights with a friends VAG and the lights haven't come back.

I still get some idling problems (revving from around 600-1000 rpm) when sitting still and the engine is warm. I read also it might be a blocked air line or cam shaft much to look at!

I'll never go back to Audi though. £100 for a diagnostic and they didn't tell me anything I didn't already know but sometimes I guess you just have to bend over and take it ;)

Posted on Oct 14, 2010


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