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ok I just finish my swap everything is fine ecxept the 41 code O2 sensor here is my swap info
d16zc v-tec on a 88 civic i'm running a p 28. all the wiring is done the car runs fine just the O2 code I repleace the O2 reset the ecu and the code still there. is there any way to get rid of this is the old O2 sensor wire need to be hook anywhere. I have recheck my wiring and is fine. Yes is converted to obd1
 

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ok I just finish my swap everything is fine ecxept the 41 code O2 sensor here is my swap info
d16zc v-tec on a 88 civic i'm running a p 28. all the wiring is done the car runs fine just the O2 code I repleace the O2 reset the ecu and the code still there. is there any way to get rid of this is the old O2 sensor wire need to be hook anywhere. I have recheck my wiring and is fine. Yes is converted to obd1
You did upgrade to a 4 wire O2 Right?
What conversion harness did you use and are you positive all the connections are secure and correct? Usually you will use the 4 wires coming off of the conversion harness for the O2 sensor. The original 1 wire is not needed.
 

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I upgrade to a 4 wire o2 and the wires I use are the one coming from the hardness conversion I recheck the conections all over repleace the o2 sensor and nothing help.
 

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I upgrade to a 4 wire o2 and the wires I use are the one coming from the hardness conversion I recheck the conections all over repleace the o2 sensor and nothing help.
What brand conversion harness and O2 sensor?
 

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Discussion Starter #5
here is what I use:Boomslang


OBD0 to OBD1 Conversion Harnesses

1988-1991 Acura Integra 1988-1991 Honda Civic / CRX 1988-1991 Honda Prelude


MPFI OBD0 to OBD1 - $110DPFI OBD0 to OBD1 - $15088-91 Honda Prelude - $150

You will need also need a 4-wire oxygen sensor and OBD1 or OBD2 distributor that fits your engine (except 88-91 Preludes). Additional parts needed for DPFI conversions.

Installation instructions are included.

MPFI includes CRX Si & HF, Civic Si, and all Integra trims.

DPFI includes CRX DX and Civic DX & STD.
 

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Discussion Starter #6
the first was an oem o2 and then I buy a bosch the colors are diferent but they plug in the oem plug and I also check the wiring diagram for that o2.
 

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As long as you wired it right and you checked the different colors on the O2 sensor to be correct it shouldn' t throw a code.

Original Honda Plug----Ecu pin/Function-------BoschO2----Boomslang

Orange/Black ---------Heater (ECU A6) -------White-------Orange
Yellow/Black --------------12 Volt------------White---------Yellow
Green/White --------------Ground ------------Grey---------Grey
Grey(WHITE) ----------Signal (ECU D14) ------Black--------White wire
(thanks to 91 Demon Hatch)

Boomslang
White wire-Signal
Grey -O2 Ground
Orange -O2 Heater
Yellow -12V+
 
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