Hi. I've had some trouble sorting this problem for the last 4 weeks. A4 1.8T Cab. The Engine Management Light came one one day coming home, it still drove the same tho, but called the RAC and within 10 mins, arrived and said it was a sensor that controls the fuel mixture as it was reading that it was running lean ( along with another fault code, which he thought would be a knockon effect from the 1st code ). The garage changed the sensor but the second code still showed so after looking into it, said the Cam needed changing to get to replace this part. After this was done (a second time as the 1st time he'd fitted it a tooth out!), I had it back and all was well until the EML came on again and was now struggling to get up decent speed and was not ticking over correctly. So he's still got it and its still showing that its running lean on the mixture and runs ok initially but then starts to misfire later in the day when its run in a bit. Its an independent BMW specialist, he has Vag Com, he's still having trouble finding out the problem. I've not got the fault codes I'm afraid but does this sound familiar to anyone? He's had it some time and will have to collect it and take it to Audi next week and pay them also!