SES Light. PO157
#1
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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..