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ok techies, any assistance here would be greatly appreciated, but i dont know if anyone will be able to help or not since this is relatively uncharted waters.

a little background:
kpro
01 civic lx converted to ex
boosted
using prb configuration with heated o2 widband from factory wired in with a relay(thanks skipbarber)

diagnosis:

checked for voltage all the way from ecu(2.38v cold, running) to before connector(2.38v) to after connector(2.38v). this is a brand new bosch sensor and should(yes i know) not be bad. im wondering if this is just a problem related with kpro not liking it wired the way it is, or if the sensor itsself is actually bad....

and yes, i realize i can just turn this off

 
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im having a simliar problem with my 2002 civic ex, i bought 2 brand new o2 sensors from honda dealer and after i installed the front o2 the code P0131 went away and it was just the P0141 secondary o2 code that was left, i then installed the secondary o2 and then when i recheck codes its telling me both are bad. i dont know what to do now im stumped i was wondering if maybe i should swap them around ? the link where i bought them from majestic honda is below correct me if im wrong is no 18 the front o2 and 19 the rear o2 ?

http://www.hondaautomotiveparts.com/...T+PIPE-MUFFLER

 
Rep Power: 0

im having a simliar problem with my 2002 civic ex, i bought 2 brand new o2 sensors from honda dealer and after i installed the front o2 the code P0131 went away and it was just the P0141 secondary o2 code that was left, i then installed the secondary o2 and then when i recheck codes its telling me both are bad. i dont know what to do now im stumped i was wondering if maybe i should swap them around ? the link where i bought them from majestic honda is below correct me if im wrong is no 18 the front o2 and 19 the rear o2 ?

http://www.hondaautomotiveparts.com/...T+PIPE-MUFFLER

 
Rep Power: 255

i have the same problem and i have never been able to repair it. people tell me its bad wiring.

 
Rep Power: 812

these are the correct bosch sensor numbers and what i have on my 2k2 ex for almost a year with no engine light. they must not be switched, they are both different sensors.

primary (in downpipe) 13532
secondary (in cat) 13534

 
Rep Power: 812

these are the correct bosch sensor numbers and what i have on my 2k2 ex for almost a year with no engine light. they must not be switched, they are both different sensors.

primary (in downpipe) 13532
secondary (in cat) 13534

 
Rep Power: 0

I'm having the same issue as well. I'm running a K-Swapped civic using K-Pro. Try doing this. Disable P1167 in the closed loop section, and it should get arid of your P1166 code. Except now it should be pulling up a P0134 code if we have the same problem. If we in fact do have the same problem, then i can help you out with going forward with it.

Also don't replace the sensor with anything besides a factory OEM one. The primary should be wideband and the secondary should be narrowband.

 
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thanks for all the info guys im gonna try to fix it this weekend