fault codes

Recently installed a Stage 2 Air Intake from AFE on my 2006 BMW M5. Immediately upon starting the car, two fault codes came up and my mechanic has been unable to troubleshoot. Codes are: 1) 2737/2738 - Filling, plausibility (Banks 1 and 2) 2) 2712/2713 - Air-Mass Sensor, plausibility. We...

Hey guys, I thought I'd start a new thread, so as to keep on-topic with the title etc. I got my car diagnosed this evening, and the following was revealed: 11 - AVANOS2-Hall Sensor 162 - Synchronisation CS-Sensor 2 with KW 92 - Post-cat sensor 1 voltage monitoring 80 - Switch chain grip...