Rolled over 4K miles tonight and I'm on my 3rd CEL. First time they cleared it, saying it was a stuck valve that they lubed. Took it in again, they said there was a TSB on it, and it was a valve that wasn't seated correctly, so they removeds it and reinstalled it correctly. That lasted about a day and the CEL was back. It doesn't affect driveabiltiy, so it's staying there until I get a chance to go back in.