the '99 si harness used for my gsr swap only has one o2 sensor plug. i think the previous owner took it off or something. well is there any way that i can tap into the one o2 sensor to hook up the other. trying to do this, to get rid of the check light for now because i cant afford to switch over to obd-1. thanks.

 

The secondary O2 goes through the floor board (behind the cup holder) and plugs into the interior harness (green plug at the ECU).

You will see a rubber plug near the cat on the body. The O2 goes in there. You then have to extend the 4 wires to teh correct pins at the ECU.

What year ecu and car do you have? (it makes a difference)

 

im doing the same thing except my car is a 96 with the cx harness. is it the same for mine? i thought just extending my second o2 sensor to reach the plug on my cx harness would work? tia

 

'00 civic dx, '00 b18c, '99 si ecu and harness

do u have a diagram of the exact location where the wires go into the ecu


[Modified by Alvin, 12:36 AM 9/5/2002]

 

where do u the o2 wires to on the ecu? the diagram for 96-98 is different