ok i have been having this problem since i cleaned the inside of my cats, or catalytic. check engine light came on, i replaced all sensors then put spacer on all of them, i recieved some codes from a scanner i cant remember but i think it was P0135 or p0130 -- i dont know what to do take out the spacers or just leave it, does check engine light takes any power or torque from our tl's ?

 

DTC P0135: Rear A/F Sensor (Bank 1, Sensor 1) Heater Circuit Malfunction (2004-2005 models)

What exactly did you clean it with?