CP02 MAC

Hi
Engine light came on, coils on bank 4 and 6 faulty, garage changed them.
Picked car up came to traffic, engine light flashed and car started to misfire and go into limp mode, stopped car, restarted runs perfect, traffic again same happens.

Back in garage error codes for bank 4 5 6 and now oil pressure sensor. Plugs changed less than 2k miles ago.

Garage a bit lost what is going on, any guidance massively welcomed. thanks

BarnacleSteve

Has the car been sitting for awhile? I had similar codes after the car sat for the winter but after driving it around everything cleared.

Petza914

You have a vacuum leak on bank 2. At idle the amount of air leaking in is proportionally much larger to the amount of metered air coming past the MAF than it is when you're driving. If the stored misfire codes are lean, that's likely your issue. Smoke test the intake to find it. Any work done recently that required reveal of the intake manifolds or plenum - getting those boots back on correctly sucks.

If not, check bank 1 and 2 camshaft deviation numbers. If bank 2 shows 0.0000 you need a new camshaft position sensor. This usually shows up as the car running fine for 2 minutes after being started, then runs rough and throws a code when switching to closed loop mode.