Here’s a picture of good old smokey,,,,I have a N63TU 2014 650 with the check engine light on,,,,,check faults memory,,,,,found 2 faults both on bank 2,,,,,lean mixture bank 2,,,,,and O2 sensor after catalytic converter lean mixture slow to respond ,,,,performed test plan for lean mixture and it said problem is the O2 sensor,,,,but me knowing better the O2 sensor could be one of the problems,,,,,but there could be another problem causing the problem,,,,,so to be sure,,,,I decided to smoke test the intake system on bank 2,,,,and look what I found a intake leak,,,,the plastic intake running that goes into the turbo is leaking pretty bad,,,,,,they do leak a little because it’s not a great set up and never seals 100%,,,,,but it shouldn’t be this bad. Here what I found once I removed the plastic intake running to the turbo,,,,,,notice how the plastic ear tab is cracked,,,,,,and that one eye hole is where it gets mounted on,,,,,so that whole intake running was loose and causing the intake leak. Here is the old one and the new one,,,,the new one is the one with the orange turbo seal at the end,,,,,that’s also one of the new seals we replace during the customer care package.
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