2014 Panamera Turbo. 55k miles, I’ve only had it for about 3k miles. I’ve been getting a few engine codes and was running a data stream on my scanner (yes I know- not the proper Durametric- will get one soon). Anyone have any thoughts on these numbers? Major difference between the 2 banks. This is at idle. I may have a post cat O2 going bad on bank 1 but I don’t think that would have anything to do with these numbers. It runs fine- has smelled rich since I bought it. In the past week I started hearing what sounds like an exhaust leak behind the passenger front wheel.

 

I had something similar. I do not recall if Bank 1 was driver side, or not, but had a vac leak due to the oil separator on the driver side. Replaced that and the banks went even, again.