N63tu lean mixture faults,,,,,check engine light was on,,,,found lean mixture faults on both banks,,,,and also lean misfires and O2 sensor faulty,,,,removed the engine cover and found the vent hose broken and coming apart

You can see the hose crosses over to both cylinder heads,,,,also the other hose next to it has to be replaced also,,,,due to a updated hoses

Here is a picture of the new updated hoses,,,,noticed they are now made of a high temperature rubber,,,,not like that hard plastic that get all brittle and cracks,,,,time will time how this new hose holds up with all the heat from the twin turbos,,,,,the O2 faults were also caused by the lean mixtures.