Wow...very surprised to hear of that kind of a parts backlog. How many miles are on the van? Was it sitting for awhile before you purchased it? I'm fairly sure the ESS uses a conventional lead-acid battery that's susceptible to sitting for long periods of time and becoming discharged. Once they discharge they suffer permanent damage.2017 Chrysler Pacifica Gas models with ESS small auxiliary battery stopped working as of 6/2/2018. This has affected the start from a distance on the Key Fob. The Authorized Dealer "Auto Nation" parts manager and service manager stated that the auxiliary battery has been on back order for over a month. (there are over 27 other owners waiting for the battery) Chrysler is not or has not filled any axulliary battery back orders. What is happening???. We've only had the vehicle a year w/9000 miles. Is this the start of future problems with this ESS system??? This was the main feature that attracted us to this vehicle.
Hope they get you running soon!
I think that every little bit helps, and over the life of the van those little savings may add up to something. All the fear over wearing out a starter seems a bit misplaced to me, this isn't new technology. ESS has been around in various forms for quite awhile, and starter failures don't seem that common since they're designed explicitly for the increased duty cycle.I have the ESS feature in mine. I didn't think I was going to like it, but I left it on to try it out. After driving with it for a few weeks now, I guess I'm kind of indifferent toward it. I've been averaging 14 miles to the gallon in my truck for over a decade so I'll probably leave it on to save every ounce of fuel I can to make up for it though.
Apparently these things don't tolerate sitting, though. I'll definitely keep that in mind if I ever have to store the van...perhaps a battery tender or occasional charging is a good idea if being parked for a few months.