2002 camry stalling

What Engine is in this vehicle? What is the Code ID. Need the full letter and number. The proper Scan Tool should be able to read this vehicles Data Stream......which would verify O2 sensor operations. I would be inclined to follow the code(s).

This is a common issue with many people. Never seems to be the same fix twice. Either people never figure it out or they end up changing every part in the car. I always suggest the inexpensive avenues first. Buy a can of throttle body cleaner and a can of MAF sensor cleaner. Remove the black intake hose from the throttle body and spray down the inside. Remove idle air control valve and clean that as well. Remove MAF and spray down the contacts. Then remove your EGR and clean any carbon out of it with the throttle spray. See if that cures the stalling issue. Post back with results. If no change, I would start with the bad O2 sensor. If no change, I would then replace the TPS. Check Youtube for instructional videos on throttle body cleaning and MAF cleaning if you're unfamiliar.