So when I accelerate to 6k rpms or more my car will bog and the vdc slip lights come on and my transmission will shift hard on down shift or up shifts, I do have an ses light saying my 02 sensor is bad and i have a bad a/f ratio. Could it be just the 02 sensor causing this or is there some else??? Transmission fluid last time I checked looked great and brake fluid is ok. I can turn off and on the car and it all goes away.