I did a 2001 b18c1 swap on my 98 civic hb using a 1998 civic ex harness. Now the car is throwing a secondary o2 CEL. I can't find the plug for the o2 sensor on my wiring harness. Do i have to wire the sensor straight from the ecu?

 

 

u just gotta look harder...ur car should have 2 o2 sensor plugs

 

nope, I only have 1 o2 sensor plug. Is it because the 98 civic ex had the 02 sensor plug behind the cup holder and not on the harness?

 

I thought all OBDII cars had a before and after cat O2 sensor?

 

im throwing the same code on my 96 ek hb with 97 usdm gsr swap. I just said screw it and converted to obd1 p72 ecu

 

i tried to fix it by welding a second 02 bung on the piping after the cat , but still throws the o2 cel

 

get a jdm ecu if u dont want to throw that code nemore

 

yup I'm already about to switch to obd1, but i also want to state ref my car, so i basically need the second o2.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by silentbeatz &raquo;</TD></TR><TR><TD CLASS="quote">I did a 2001 b18c1 swap on my 98 civic hb using a 1998 civic ex harness. Now the car is throwing a secondary o2 CEL. I can't find the plug for the o2 sensor on my wiring harness. Do i have to wire the sensor straight from the ecu? </TD></TR></TABLE>

i don't know but i thought u should be having 2 o2 sensors. maybe u did something wrong