Got the check engine light again, this time it was P0171 System Too Lean Bank 1. I had been meaning to replace some of the stuff on the vaccum system and thought I'd give it a quick look see if that could be the cause. Sure enough, I found a tear in an angled hose (AUDI Part Number: 058 133 783L). So I thought, ok, this will be easy, and searched for that part only to find that it had been replaced by (Genuine Audi/VW Part Number: 06B 133 783 BC). so I went to the dealer to get the part (normally I would have bought it online). I also bought an OEM clip (Oetiker Hose Clamp) to secure it, (Part Number: N10201901).
