Originally Posted by 1BADM6

I guess I am welcoming myself to E53 ownership. I got the Engine Failsafe Prog CEL today, no throttle response and crappy idle. Fortunately it happened in my driveway. I'm hoping it's my battery because, as a new to E53 owner, I sat in the cabin with the music on while reading the manuals. I didn't think I was in there long enough to drain the battery but I also don't know how old it is. I'll check voltage in the morning. It was running great after the gym and all of the way home. No other CEL's were noticed. The PO did say it was needing valve cover gaskets and there is minor evidence of leaks. Outside of that they are dry and I also have a suspect CCV. I have the replacement in hand.

I've searched all over for my OBD2 reader so I'm kind of going at it blind. I might pick up a generic one before I get a bimmer specific diagnostic/coder. Wish me luck.