I searched for a while and didn't find anything so here is my question.

I just purchased a '95 Civic LX sedan with a '95 JDM B16A swapped in. The ECU is a chipped P28. The check engine light is on because the car is still using the LX 2 wire O2 sensor. I have been offered a new NGK 4 wire sensor that was destined for a GSR that was sold. Is this the right one for my engine and what is involved in the conversion? Will I have to run any new wires or does this thing just plug right in?

Thanks in advance for any info that any of you may be able to provide.

 

Anybody???

 

Beuler???

 

P28's require the use of a 4 wire O2 sensor, any Honda/Acura 4 wire O2 will work so yes the GSR one you have is what you need. I can't say what wiring will be needed since I don't know what's been done to the car, but either way you MUST use the 4 wire O2 and have it properly wired in order to get rid of the CEL.

 

what he said!

 

Just do what everyone else already said. As for wiring it up, here's the easiest way IMO but you can also tap right into the shock tower plugs as well. I posted this on other threads awhile back:

White wire on O2 sensor is signal wire. Green wire is Signal ground. Both black wires are the heater circuit wires, and though someone has said that the polarity matters, I don't think so, or Honda would have made them different colors. One side goes to the heater circuit control, and the other goes to 12 volts switched power. The ECU grounds the heater circuit when it wants to turn it on.

Run O2 sensor signal (white) to D14

You can run the O2 sensor signal ground (green) to D22 (or any other good ground)

Run O2 sensor heater circuit control (black) to A6

You can run your O2 sensor heater circuit power (black) to A25/B1 (or any other good switched 12v source)

 

Thank you very much VTECVillian and Newman.

As for you soulrider4ever, I'll thank you after I get to drive your CRX.

3 rev limiters in one night, and it could have been 4!!!

 

im curious as to how your lx had a 2 wire o2 sensor, i have never seen a 2 wire honda o2 sensor.

 

Maybe it's 3? I haven't been under the car yet. I'm only going by what the owner told me and what I've read on here in the past few days.

 

on everyone i have worked on it is a 4 wire sensor.
only the CX has less with a 1 wire sensor, while the vx has a 5 wire sensor. my civic dx hatch which has the same d15b2 engine and p06 ecu used a 4 wire o2 sensor that i used on the h22a in the car now.