I just put dc headers on my tc and my check engine light didnt come on for a a couple days, now i knew that eventually it did have a chance of coming on, now does anyone know how i can correct, i already knew about disconnecting the battery, i did that already and within a couple hours of driving it came back on, so does anyone know how i can fix this problem[/b]

 

Read this:


https://www.scionlife.com/forums/vie...nti+fouler+fix

 

anti-fouler

 

i did the anti fouler trick to the headers o2 sensor and the cel still came back on, so im guessing i have to do this also to the s-pipe o2 sensor also than correct?

 

you don't do the anti-fouler trick to the o2 sensor on the header, that one is supposed to read the raw o2 data to make a/f corrections. you are only supposed to do the anti-fouler trick to the o2 sensor on the s-pipe.

the o2 sensor on the header itself reads a/f ratios and makes corrections to the engine. the secondary o2 sensor on the s-pipe is just there to detech whether or not the catalytic convertor is working properly.

you need to do an anti-fouler to the one on the s-pipe because you no longer have an catalytic convertor, and the CEL that it causes is supposed to be telling you the cat has failed.

so running an anti-fouler on the primary o2 sensor is just stupid, probably making your car run like crap because it isn't getting a proper reading.

 

You can buy the CEL eliminator here. I have them in stock.

http://www.nolimitzind.com/cel.html

 

all is well now, i did the fix to the secondary o2 sensor, thank you everybody