Originally Posted by carta79

I would start looking at the fuel filter or the primary o2 sensor as probable causes. That's just where I would start though. The fuel filter would run you less.

Does the car run rich and/or sluggish? How much mileage on the car?

Originally Posted by teg92

I dont think it would be a bad o2 sensor your only getting code 43 if you had a bad o2 you would get a CEL for that to. What kind of Mods do you have on your car? What kind of car is it?

Originally Posted by Kyo Kusanagi

Thanks for all the help, i finally fixed it. It was none of the injectors. It was my o2 sensor. Replaced it and everything works fine.