fuel injector or something else

2012 and your already running into some serious issues under 50K. My gut instinct is to get them to fix whatever the issue is and just trade it in or sell it. It's possible the last person that had it had a lead foot or did a terrible job maintaining it. Think of what you will deal with at 100k miles.. You should still be under the powertrain warranty upto 7 years of 60K miles, take it to a jeep dealer to inspect

its at the dealer they have had it for 2 weeks now actually

once they fix it, I'd find something else. I'd prod the dealer to ask why its taking so long, maybe you can negotiate a sweet trade with them.

My car don't start after I change the battery no power com te injection no power to the ignition switch what the problems