u/Deeelaaan

Long story short, I picked up another car for commuting back in January which meant my sti was basically just sitting for quite some time with some driving in between. Im trying to get the car registered but I had to take it to get smogged where I was told the O2 sensor is showing as failed. I plugged in my innova obd tool and when the car is on it shows O2 as green but when the shop checks it on theirs it shows as red.

I was told to just drive it around for a while but I'm probably at over 250+ miles since getting it initially smogged and it still failed today and unfortunately now the car is outside of the registration window without fees. The car is completely stock internally. Has this happened to anyone else?