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Originally Posted by PetrolioBenzina
Same issue. Flashed stock ROM, passed.
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Sorry to necro. Oregon here too, but I flashed stock rom back and still failed DEQ. I was told to complete a drive cycle per OEM. Would this possibly be because I cleared the ECU fault codes the morning before I did DEQ? My O2 sensor, EGR, EVAP, Fuel System were marked unready after a good 30 minutes of driving.