After 2 bottles of fuel injection cleaning type in one tankful of gas and 50+ miles of accumulated driving, the Check Engine light was turned off. The car ran fine as usual, but P0012 code was still in the on-vehicle memory, via an OBD II scanner.

This BMW belonged to my wife's girl friend. A a couple of weeks ago she opted for a trade-in at local dealer. She is now driving a mid-size Mercedes-Benz SUV.