I recently had an issue with my AutoStop feature. (2017 Pacifica Touring L Plus). My experience may not reflect issues other people are having, but this how I think my issue was solved.
I was due for an oil change. I had reached the recommended amount of travel distance, but was keeping an eye on the 'oil life' read out on the van's info display system. Eventually I started receiving a message that I was to replace the oil soon. I took note and drove on. By and by, I started receiving a message that I needed an oil change now. It was scheduled for a couple of days hence, so I didn't worry. I remember precisely the moment the AutoStop feature stopped working. I was just starting up, from waiting at a light, and the van flashed me a message saying that the AutoStop feature was now no longer available. At that moment I had wondered if the engine management system had disabled the feature, due to the engine oil age? You know, to prevent any damage from stopping and starting often? For the next two days, the van operated normally, except for the oil change warning and the lack of AutoStop. It was then my appointment had come due.
I brought the van in for a diagnosis and an oil change. The shop told me the cranking battery needed replacement. It measured low on the capacity value, when compared to a new battery. It would be a warentee replacement, so I had them order it. Mean while, the oil was changed. After that my AutoStop feature worked normally. It took a week for the new cranking battery to come in and during that time, the AutoStop feature worked 100%. I told all of this to the shop, but they still recommended replacing the cranking battery, due to the value that was read out on it, when tested.
Two weeks now, still no problems.