Okay guys! I have been researching my P0133 OBDII code problems for months.

3 O2 sensors and new catalysts later.. Im still having the same problem. Is there someone else out there having problem w/ their 97-98 civic ex cpe after installing their DC headers? Please i need ur help!

 

the header probably isnt a "tuned" one so it wont let the o2 sensor work properly. exhaust is great and a nightmare in one. hows that for pro and con??

 

yeah! thanks for ur input. I think i denied the fact that maybe there was something wrong w/ the DC headers for a long time, due to their reputation.

u know anyone who is selling their their stock manifold?

 

Did you have this problem with a stock manifold? I never had a problem with o2 sensor when i put my DC header on.

You sure you have both sensors on in the right location?

 

You can get an O2 simulator and just not run an sensor, and still run your header. Just another option

 

no i did'nt. the primary reason i bought the DCs' cuz my stock manifold was cracked. even then i was getting any codes. rather than paying 350 for stock manifold (just the upper piece), i got a deal on new DCs' for 275.

 

i can, but my smog is coming up soon.. i could easily pass smog simply clearing the ecu for the test.

 

so putting on after market headers will affect your O2 sensors?

 

i think it's a case-by-case scenario.. in this case it's bad headers. I had DC headers on my 93 hb si and i had no problem.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cvccjdm &raquo;</TD></TR><TR><TD CLASS="quote">i can, but my smog is coming up soon.. i could easily pass smog simply clearing the ecu for the test.</TD></TR></TABLE>


Wrong....that won't work. Your car will fail the self diagnostic test and if the header isn't crab legal (not sure if DC's are) it'll fai there too.


I speak this from experience of late.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cvccjdm &raquo;</TD></TR><TR><TD CLASS="quote">i think it's a case-by-case scenario.. in this case it's bad headers. I had DC headers on my 93 hb si and i had no problem.</TD></TR></TABLE>
so how many headers did your guys put on the civics that could be the problem

 

well... it work the last time i resetted the ecu during my smog test and yes the the DC headers i have is CARB legal. its stamped right on top the header