redbandit98

iTrader: (13)

i bought some o2 simms to put on my car recently. It was throwing a catalyst low eff. left bank two. i bought some simms instead of a new sensor as i plan on going with an ORY. when i installed them i still got the same light though. Some one advised to replace the front o2 sensor as it sometimes will go bad and cause the back sensor to throw a code. since i was going to use the simms, i took my driver side back 02 off,and put it on the front passanger side since it had never thrown a code. still same code left bank two low effiency. THEN i reset the codes drove around and now i have the same code again plus a high voltage code on the other side (both on rears) could both the simms be bad? WTF is going on here..plus it feels like my car has lost alot of power on the bottom end.
thanks
matt