Im hooking up my air/fuel gauge and i had to put in a new o2 sensor(Bosch). My ? is which wire is the signal wire. The Bosch wires are different colors than the ac delco ones.The bosch wires are gray,black, and 2 white ones. Which one is the signal wire?

 

Not sure but I wanted to give you my opinion on the Bosch. THEY SUCK I went through 3 sets before I returned them and bought some acdelco's and no more problems

 

jeremy please describe the problems you have had from boosch o2 sensors.....


jesse

 

grey is signal, black is sensoir ground, the whites are power and ground for the heater

 

Thanks.