i am doing an obd1 b18c1 swap into my 90 si hatch can i use an obd2 o2 sensor in the cat? basically what im asking is are their any differences between the two?

 

somebody has to know this...is the wiring the same on the o2 sensors between obd1 and obd2?

 

help please!

 

Um, I dont think that would be just a direct bolt in. Most of the modern o2 sensors (obd2) are heated. So they have 2 wires going to them. If your civic is like my 88 crx Si, then the o2 sensor only has one wire.

 

see the problem is i am doing an entire change over for getting my bar sticker...so i am running a complete obd1 gsr including the cat. which is where the o2 sensor goes... i cant just go buy the o2 sensor because it will come without the connectors which i dont have...i have an obd2 sensor available to me i just need to know if they are compatible....i know it will fit i just dont know if it is wired the same....somebody here has to know this...help me please....

 

obd0 and 92-95 cx uses one wire, 92+ non-vx/hx use 4wire o2, 92+ vx/hx use 5wire o2..

basically it depends on the ecu you'll be running, if you're getting a conversion harness to run an obd1 ecu.. then 4wire o2 it is.. if you're using an obd0 computer, then get a 1wire o2.

although you said you're trying to ref it.. so at least you have to get the obd1 gsr stuff.. obd0->obd1 conversion harness (i got one ), and 4wire o2 (got a few of those too.. but they're used of course).

the wiring has been covered on more than one occasion.. search, or..

aim: gettruent