Had problems last fall passing the "E" Test. I never had any engine cel codes on the dash, bought the car used so I dont know if it even works? Car seems to run fine though...so today I picked up one of those cheap OBD1 code readers and decided to try it out. Well I pulled the following codes 172, 173, 176, 136, 117. It seems they point to the O2 sensor?? What do you make of these codes? And should I replace the O2 sensor? There is 2 sensors correct? Car runs fine, does not overheat, but when I did the "E" test last fall it failed the first test with high
( NOs )?? Gave it a good blast on the hiway and it just bearly snuck under the limit but did pass. Would these codes be the problem and what should I replace?
Thanks alot.
