Don’t worry about you having a lemon, it would have flagged loads of other fault codes in other modules with implausible data received from PCM but these will clear and not return.
I would ask them to update the software in the ECM at the same time (other TSB I posted). I always like software at the latest level. It is an hours labour to do it so call and ask if they will. You have to recode the injectors after the flash and lots of dealer have trouble doing it (don’t know why) so if they are going to do it get them record the injector valves that are stored in the ECM first before they flash it so they know what to program back in after.
UK Chrysler Jeep Master Tec.