1994 honda civic dx failed california smog (which i think 75% of people do lol) just need a little help understanding the work sheet since the smog place is not "allowed" to tell you why it failed but the guy hinted ... he told me it was an easy fix

first i needed to fix the CO(%) portion which he actually did say was the O2 sensor...is this correct? (my car was 0.65 max is 0.55)

then said i needed to fix the HC (PPM) section..can someone please tell me what that stands for and how i would go about fixing that... (my car was 226 max is 92)

then said after those are fixed fix the NO (PPM) again could someone please tell me what that pretains to and a good way to go about it.. (mine was 2862 max is 716)

my readings i failed are all at 15mph i passed the 25mph tests though..

Thank you.
cantbetouched24 is online now Report Post Edit/Delete Message

 

Failing all three pollutants probably means that your catalytic converter is shot. If the O2 sensor were bad you'll fail CO and HC but should easily pass NOx.

 

thanks.. im going to look into that. ill change the O2 sensor first and take it back it was just a pre-test anyway.. and see if that changes anything if the numbers stay the same or pretty close to it after that then i'll know for sure its the catalytic converter.. which would suck because living in california that easily doubles if not triples the price for one..