does aynone have or know where i can find step by step instructions to check if my o2 sensor is clogged or jacked up. my check engine light was on for over a month because of the o2, i think.
thanks.

 

did you pull the code from the cel? Is that why you "think its the o2"?

 

yes, i did pull the code. it came out 67.

 

it came out:
CODE 67 - Catalyst system Efficiency Below Threshold malfunctioning or defective catalyst system.

 

umm then that would be your cat, not your o2

you need a new cat

 

is there a way i can check my cat then?
some people tel me its the cat and some people tell me its the o2. how would i check which one it is?

 

check the o2 sensor, and if it's fine then it's your cat. and it would help if people knew what kind of car you have.

 

^isnt that the problem? doesnt really matter what car it is though

ok if you dont want to listen to the cel, just unscrew the o2 sensor at the header and look at it...see that its fine....then unbolt the cat from the exhaust, look at it, and then replace

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by smooz EK &raquo;</TD></TR><TR><TD CLASS="quote">does aynone have or know where i can find step by step instructions to check if my o2 sensor is clogged or jacked up. my check engine light was on for over a month because of the o2, i think.
thanks.
</TD></TR></TABLE>

is your civic a 97 by chance?

 

Jack your car up safely and then get a rubber mallet and softly hit your cat a few times...if you hear something that sounds like its rattling or moving around in there its your cat..

 

i have a 96 civic hatch.

 

just checked mine after my header reinstall last week, you need an ohm meter. check with engine running and ground the black probe and put the red probe in I believe the white wire, or what ever wire indicates up to one volt. what it is, is that the o2 sensor makes voltage from 1 volt or less, .1 being lean, .5 stioch, and above rich, Im pretty sure.
when you find what wire is sending the voltage, probe into the connecter and move the throttle wile reading the meter, if its not reading across the board, say between .3 and .8, its probably bad. when you tap the throttle it should change very rapidly from low to high ( kinda hard to descriibe without pics) mine only read between .5 and .6, mine was bad.. Hope all this info I threw at you helps

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by smooz EK &raquo;</TD></TR><TR><TD CLASS="quote">i have a 96 civic hatch.</TD></TR></TABLE>

take your car to HONDA. there is an emissions extension warrenty on all 96-97 civics. it covers cat, o2's, sparkplugs, everthing like that. if you were to feel comfortable sending your vin to me I could run a vin statis through HONDA and see what is exactly covered under that vin.