97 QX4 O2 sensor help

[brent6017]

I have a three wire Bosch O2 sensor for the rear left. The vehicle has 2 white wires, one black and one gray. How do I splice this O2 sensor into my trucks 4 wires? HELP!

[elwesso]

the heater and o2 sensor probably have seperate grounds, youd want to bring the grounds together.

[nissandoms47]

You can't. You need to buy an 02 sensor with the 4 wires. Or else you'll run into big problems.

[brent6017]

I figured that, I still have the check engine light.