We'd recommend a fuel feedback test on your Nissan Pathfinder to make sure the new oxygen sensor is feeding information to the emission computer. Oxygen sensor information must be passed to the computer, the computer needs to send the correct signal to the fuel injectors, and the injectors have to allow the right amount of fuel to the combustion chambers. You need to ensure this system is working properly. If all is good with the fuel feedback test, then move on to the EGR system and ensure the EGR passages are all open, both on the exhaust side and the intake manifold side.
posted by SmogTips Support
