I was driving on the interstate here going about 75mph with the cruse control set. All of the sudden i start getting a bad vibration and the SES light starts blinking. Then the RPm's start to fall and it feels like im driving a V8 on but only firing on 4 cylenders. I limp it to Auto Zone to have then read it and it throws a misfire code, and a O2 code. The misfire code was P0300 and the O2 code was P0151 Bank 2 Sensor 1. What side is that Sensor on, i only have 2 one on each side, the other two have been removed and tuned out. I checked the plug wires and it seems like they were all still connected, when i started it back up to limp it to work it ran fine. Any one got any suggestions?

 

Bank 2 = right/passenger side. Sensor 1 = pre-cat.
The P0300 is multiple/random missfire. Hard to say what caused it. You could start by checking your plugs, coils, and wires. Maybe the cam sensor. IDK.