RS6 02 Sensor codes rough running issues

[cruzanrs6]

Greetings,

I replaced all 4 02 sensors about 500 miles ago - car was running fine except for a transmission issue (long story - car was shipped to Level 10 - complete rebuild). Pat at Level 10 inquired about some codes after the rebuild and test drive - told him all was fine before car was shipped. So the codes I have are:

Upper 02 Bank 2 P0151-002 - Signal too low - Intermittent
Upper 02 Bank 1 P0130-008 MAlfunction in circuit - MIL On
Also
P1130-001 - System too lean - Intermittent
Car is misfiring so some codes for those as well but all are 5,6,7,8 cylinders (same side)

If I reset, all is good for about 10 minutes, then same codes come back

Any trouble shooting tips/advice is much appreciated

[ShelbyM3]

Anything turbocharged I recommend checking the charge system for boost leaks. If you’re getting air into the system past the MAF, it’ll freak out. More air than what is metered and your AFR’s will be off.
I also suggest that when any work is done to a vehicle and an issue arises to double check that work. Is it possible the wiring harness is too close to the turbos/manifold and not in their clips or maybe they got pinched in the bellhousing and/or damaged during the transmission install.
Whatever is going on, I bet it has to do with those Bank 2 misfires and I bet Bank 2 is dragging down Bank 1 sensor 1 with it. Maybe check your grounds on the driver’s side of the vehicle, too.


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