mac62989

iTrader: (1)

Had an SES light on for awhile after the headers were installed. Figured it was because they are race headers without AIR. After scanning the car I got code PO157 which is oxygen sensor related. Do I need to get AIR tuned out of the computer after a header install or should I just take a look at the oxygen sensor? Car is due for emissions in a month and Im trying to get it sorted out. Thanks in advance..

mac62989

iTrader: (1)

Anyone?

mac62989

iTrader: (1)

up top. Do the front 02s on our cars do all of the work? Would it be a problem if I had the rears tuned out even though I have cats?

tsench

iTrader: (15)

i never have any problem with my 2 rear o2 tune out i have cats
tune out 2 rear o2 sensor & air and egr then no more o2 code

mac62989

iTrader: (1)

What doe the rear 02s even do? They see if the cats are doing their job?