Got a 4 wire o2 sensor so I am going to wire it up. o2 sensor wires are black, grey, white, white.

I have read black is power, grey is ground and the white wires go to the heater and I may have to swap them if it does not work at first.

Is that correct?

 

bump

 

It depends on exactly what kind of car you are talking about. Is it safe to assume you're referring to a 2005 hyundai sonata ?

 

Sorry, It is for a 91 CRX with a ZC OBD1 swap. I have the correct ECU wires identified. Just wanting to make sure I have the o2 sensor wires identified correctly.

Thanks