This.
Disabling the rear O2 sensors keeps the car out of ready mode. It will fail in any state that checks the OBD2 port for ready mode.
Quote:
Originally Posted by kitw
No, you'll fail anywhere OBD2 readiness tests are used, which is pretty much everywhere at this point.
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1987 Buick Grand National, 2009 BMW E90 M3, 2016 Audi S6, 2018 MB E63S AMG, currently in 2021 M5 Competition