Ok so i put a 4-1 DC sports header on my 98' civic ex. with the installation of the header the placement of the O2 sensor was moved to just behind the oil pan. the headers came with an exstension wire and after the installation the check engine light would periodically come on so i replaced it with a brand new one and now the light wont go off and im still pulling the same code.

a note when i first replaced it the wires on the O2 sensor were switched i thought that was the problem but i guess not... Any suggestions on what it could be?

thanks

 

whats the code?

 

you prolly wired something wrong, or the wire that came with the kit is a wrong size, or wrong metal. DC junk

 

is the sensor before or after the converter now?

 

"the installation the check engine light would periodically come on so i replaced it with a brand new one and now the light wont go off and im still pulling the same code"

same thing happened to me...except..the code was 48 with old sensor and now its 41 + 48 with constant CEL...weird...

 

check the wires that lead from the o2 to the ecu,soemtimes when it shows a code for a bad ecu its a burnt wire.

 

its right before the converter. and i know the wires fit right with the exstension. what do you mean the wrong kind of wires?