Re: Dealer 16K Service
If it went in working fine, it's their problem. Calmly explain this to the manager. *If the manager starts busting your balls, don't raise your voice, just ask to speak to the owner. *
Their are plenty of 'advocates' for you in this case if the shop gets snooty, and the shop knows this.
As far as the problem, I'm not going to try to diagnose this at a distance. *It could be almost anything. *Start with the grounds, get the fault codes and start looking.
The TB's don't have to come off. But they are around a lot of electrical connectors and one could have been knocked off, partially undone...