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  1. Re: Oil Consumption? 
    #11
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    I think the oil consumption and the emissions warning are related. Most likely the oil is burnt by the engine since its leaks between the piston and the piston ring so it creates soot.
     
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  2. Re: Oil Consumption? 
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    Quote Originally Posted by ckq7 View Post
    I've got an update on this. The Q7 went back to the BMW dealer for a week and they got a local indy garage to replace the coolant valve and check the oil issue (£560+vat with 7.5hrs labour).

    Picked it up yesterday and on the drive home the drive system amber warning came on the dash (yellow car with '!' on it) and had reduced power, switching ignition on-off cleared it.

    I immediately drove back to dealer and they said they found the inlet manifold had an excessive amount of carbon build up, this was cleared out during the work and it was probably just the ECU re-programming following the extra air-flow... They advised me to drive home (66 miles) and if the car flags up further errors they will come and collect it and sort it out. It did flag up errors all the way home and went into reduced power mode. After about 30 miles the Emission Control Dash Light lit up and is now permanently lit (ignition on-off doesn't clear it).

    The work the garage did was to replace the coolant inlet valve diagnosed by my local audi dealer, the parts used are a regulating valve (£79.17), connection pipe (£5.01), elbow connector (£7.09), 2 x spring clamps (£4.79) and pipe (£62.73). Do these parts seem right?

    Any idea what would be the main causes of these dash errors - some sensor they could have disturbed during the work? Is the car undriveable? Would the AA be able to diagnose it at home?

    On the oil situation, I put about 150ml in and it topped up to full! I'm not convinced it's got a major oil consumption problem but the electronic gauge is a bit sensitive, normally a half level on a dipstick would be 500ml+? The garage did look for leaks and exhaust soot etc. for oil leak during the valve replacement.
    This seems to be rather a serious fault. It is difficult to advice based on your descriptions. Check Engine and Emission Control lights could indicate a more serious failure that can be diagnosed only by a professional Audi service. IMO the car is not suitable for further driving and the service stories that the computer has to learn new settings after cleaning of the inlet manifold you can treat rather like a fairy tale. Driving this car in such a condition is risky and can only make things worse.
     
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