i have had my 99 si for some time and I got a check engine light and its saying its the primary O2 sensor on the manifold, I replaced that sensor with one from honda but Im still throwing the code.. I have a DC header, aftermarket intake and full exhaust. does anyone else have the same problem and if so how did you fix the check engine?? thanks

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Afikindaguy23 &raquo;</TD></TR><TR><TD CLASS="quote">i have had my 99 si for some time and I got a check engine light and its saying its the primary O2 sensor on the manifold, I replaced that sensor with one from honda but Im still throwing the code.. I have a DC header, aftermarket intake and full exhaust. does anyone else have the same problem and if so how did you fix the check engine?? thanks</TD></TR></TABLE>

did you reset the ECU?? - if not, unplug the battery for a few minutes, take her for a drive and if the light comes back on tell Honda they gave you a bad sensor.

 

did u reset ecu ?

 

yes i did reset the Ecu and the light came back after maybe 70 miles. I heard that modifiying the exhaust manifold and intake would make the car run lean and can't cope with the 02 sensor but thats bull unless alot of other people are having the same problem

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Afikindaguy23 &raquo;</TD></TR><TR><TD CLASS="quote">yes i did reset the Ecu and the light came back after maybe 70 miles. I heard that modifiying the exhaust manifold and intake would make the car run lean and can't cope with the 02 sensor but thats bull unless alot of other people are having the same problem</TD></TR></TABLE>

its funny, i was going to ask if you always had that header on there or just installed it. Did it throw CEL before or after new header?? could need a tune..although you shouldn't have to.

 

I through the cel some time after i put the header on.

 

hmm...it definitely wouldn't be worth paying to get the car dyno tuned for a header. time for an o2 sensor simulator?

 

yea it would'nt be worth that but what is a 02 sensor simulator??

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Afikindaguy23 &raquo;</TD></TR><TR><TD CLASS="quote">yea it would'nt be worth that but what is a 02 sensor simulator??</TD></TR></TABLE>
pretty much what it sounds like - in your case..it will trick the ECU into thinking that you have the stock header installed.

Hence..O2 Sensor Simulator

 

sounds like it would fix the problem that i have.. where would you find something like that becuase strangly enough I have never heard of that.

 

umm..let me check a couple of sites i have bookmarked. i'll edit this post in a minute with a couple links if i can find them - in the meantime though...hit the red Search button..look up archived content and search for O2 Sensor Simulator


EDIT: the ones i keep finding are for secondary o2 sensor only. if you can't go that route then i guess bump this til you get your answer. sorry dude, good luck

 

aight thank you i will