Question about 2004 Audi TT

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Intermitent Oil light

Is there anyone out there that can help with the most frustrating problem I have incurred with a car ever?!!! The oil light on my Audi TT Quattro has begun coming on when the car is being driven yet goes off once the car is in idle. I have spent the past 3 months replacing the sump, the oil twice, the filter twice, the pick up pipe, the oil pump and the oil sensor. I have had the ECU checked and all is OK, I have had an oil pressure test carried out and all is OK in idle but does drop when driven. The engine has been flushed out, the bottom end stripped down and examined for any obvious defects and the light still comes on. The car drives as sweet as a nut, there are no rattles or worrying noises but despite the car being in at Audi they cannot throw light on what the fault may be. Has anyone experienced this problem? I have only had the car 3 months and now thinking of getting shut of it as its parked up in a garage as I am reluctant to drive it in case there is something worryingly wrong. If anyone can help I will gladly buy you a crate or ten of beer!!!!!!

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  • warren_cross Jun 04, 2010

    No no oil leaks that is the total mystery.

  • warren_cross Jun 04, 2010

    Many thanks..............are you sure the sensor is on the end of the dipstick?



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Try molyslip in your engine,just in case,if oil light comes on,try changeing the dipstick,as the sensor is on the end.....otherwise great choice of car....

Posted on Jun 04, 2010

  • geoff hunter Jun 04, 2010

    yellow plastic,with a metal band in centre.acts as level indicator...

    if low pressure was seal/bearing leak,it would be worse when at idle....pretty obvious.


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Oil lights normally mean you need Oil, If the light is on and the oil is full, then it must be a bad sensor, unless it is related to oil pressure.

If the oil light is related to oil pressure, then you may have a bad crank seal or summin. Does the car leak oil? If so thats probrably where the problem is.

Posted on Jun 04, 2010


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