Ok let me start off by saying i have searched and no1 seems to know a true reliable answer so if you dont know for sure please dont respond, Thanks


I have a Bosch universal o2 sensor replacement ( i know theyre not as good as OEM blah blah blah)

anyways.....I have 4 wires coming out underneath the car the two black wires i know are the heater wires, then i have a white wire and a green wire i just need to know what one of these wires are...I cant figure out which one is the signal wire for sure

If you know without a doubt please help, pm me if possible...thanks alot

 

The white wire is signal and should hook to the black wire on the bosch. The green wire is ground and should hook to the gray wire on the bosch.

 

x2

 

ok thanks gents!!