How do I replace O2 sensor? Is this easy to do? Do I have to worry about computer code or error code when replacing.
The reason why I want to replace the sensor is because I consumed too much gas. My full tank is about 200 -215 miles. Local drive.
Had replaced wires (ngk), plugs (denso platinum), oil change (synthetic), flush radiator last summer. Before this, my full tank is about 180-190 miles. I have little improvement.