One problem related to o2 sensor has been reported for the 2005 Dodge Ram 1500. The most recently reported issues are listed below.
Truck keeps stalling in drive and reverse. The truck will only run good if its in neutral. The rpms just drop suddenly, but the truck is able to start right back up with no problem. Truck also has had throttle body replaced along with O2 sensors. The engine light keeps coming on and sometimes the engine light would flash for a period of time.