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Update:
Well just received call from dealer the DMTL pump (Leak Diagnosis Pump) was bad and they had to replace it . Research shows this is part of the fuel system that it turns on the check engine light when you leave your gas cap off (so Chuck you were close in your diagnosis). So the system works just would be nice if they put out message.
I get car back tomorrow (pump has been replaced but they are waiting on some rivets for the fender which are due in the morning).
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2022 X6MC - 2011 335D
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