The cheapo OBDII scanner from amazon wins again. This time, it showed me that my MAF sensor on the truck was being a turd. A can of throttle body cleaner, MAF cleaner and a toothbrush fixed it all up. I did have to take apart the whole intake system and essentially hose down the throttle body and butterfly with cleaner and scrub over and over, but it was insane how much carbon buildup there was. Truck runs great again (for 150k+ miles) and isn’t throwing codes. Success!