I only changed the downstream O2 sensors. I also cleaned the MAF 2x because the first time I didn't clean down the tube where the actual sensor is, I just cleaned that glass orb on the outside. I also ran cataclean through last weekend. I never reset the codes after the cataclean because on the bottle it said the lights should go off if that was the issue so I'm waiting for that. I'm about 1/4 of the way through the tank after refilling from the cataclean application. I have stock DENSO spark plugs on order that should be here this week sometime. I was also thinking about cleaning the throttle body.BOW - You stated that you "changed the sensors".
You changed all four sensors ( 2 air-fuel and 2 oxygen), or just the downstream oxygen sensors?
And you did thoroughly clean the mass airflow sensor in the intake air duct upstream of the throttle body?