i know theres one right off the header but i cant find the other one, i have a 1990 teg rs, 2dr, ive looked under the carrage, but cant seem to find it, can someone point out where it should be so i can get a better idea of where to look, thanks alot guys

 

on a 90 teg there is only one o2 sensor on the header

 

oh ok cool thanks alot man, oh yea would not changing your oil cause ur check light to come on? and how would i fix that

 

no you need to take the carpet loose where your feet are on the pasensenger side and read the check engine light codes,the first long flash is the first number and the short flashes are the second number. ex blink blink short blink blink blink fast code 23 you get it post what happens