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Hey guys. I have a 2015 mustang gt with longtubes. Anyways my car is throwing a p2251 code o2 sensor negative control circuit open bank one sensor. So I know that's my passenger side o2 cause that is where cylinder one is. I had to replace all spark plugs expecially bank one cause they were...

Hey new to the forum. Anyways I've got an issue that maybe one of you can help me with. I got a 2015 mustang gt with long tube headers, cat delete and resonator delete with h- pipe. And 10 series dyno flow mufflers. Anyways the car is running rich all the time. The AFR gauge stays at 11.0. I've...