intermittent loss of cmp or ckp what do i need to do? on 2003 Dodge Stratus

i had it hooked up to a OBD2 reader and it gave me 1391 code but the autoparts store had no idea what it meant. the car is jerking and keeps stalling when warm.

2 answers 4 comments
Need further testing performed code doesen't mean parts are at falt.
What other testing?I was told it needed a O2 sensor but nobody knows which one I guess there is 3 different ones in this car, then they changed t. Im so confused I dont know newer cars, im an older car gal lol
Who scanned your car? Have another scan test write down all codes and post
so we can help you. I am pretty much old school myself !!
Advanced auto scanned it and it came up with 1391 this time but I will try to get it read and get the codes on here so I can get your wisdom in helping me figure it out. Thank you.
seek daig and est from a MECH not auto zone