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I wanted to share my overall experience for a year and a half of stop start.

I thought it may help others see that theirs IS functioning properly- its just not designed very well.

When first got my car, the stop start worked CONSTANTLY. No matter how little I drove, it worked.

As the battery aged, this changed. Slowly it would say ESS wasn't ready on occasion but still work 90%...

Then 80%..

Then 50%...

The never. UNLESS-

I drove a decent distance at speeds of 45+ to recharge the battery.

Now, it never works as Im self employed again. I barely drive. Its ALWAYS "not ready"...

UNLESS... I drive a bit.

Now I do drive bunch of short trips daily, and some on the FRWY but I live in SoCal and most of the time I never hit 45+ for more than a couple minutes and that won't charge the ESS enough.

So I think one of the realities is this system just doesn't function very well without driving the car at speed to charge the battery.

Which to me is completely reasonable- I just wish they would admit it... SO many threads where this happens and people replace batteries and some are bad, yes, but I would guess just as many are...

"Working as expected..."

I LOVE my car. And I actually like the ESS feature. Its just not ready for REAL driving... only theorized.

If anyone wants to add or correct me please do! This has been my only ongoing issue thats unresolvable!

And if ChryslerCares chimes in? Well just don't. You've blown smoke at this for a year. I can't stand their presence here anymore. Just BS corporate stooge greasing the forum community for sales. But many seem to like having that fake hug around... LOL
 

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My start stop works decently unless its cold out. If its cold out it always says its charging. When i say cold i mean like 45 degrees or lower even after 3 hour drive on the interstate
 

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And if ChryslerCares chimes in? Well just don't. You've blown smoke at this for a year.
LOL!

Are you trying to prevent Chrysler Cares from showing the love?
Showing how much they really, really care?
Exposing them as just a PR function?
Window dressing?
Lipstick and earrings on a farm animal?

Heavens!
 

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My start stop works decently unless its cold out. If its cold out it always says its charging. When i say cold i mean like 45 degrees or lower even after 3 hour drive on the interstate
Well said. This is pretty much how mine works. In cold weather I may have to drive 15 or 20 miles before ESS becomes operational (that is to say leaves the battery charging mode). Otherwise, the vehicle is fully warmed At first I thought the battery was fishy or something really depletes the battery in cold weather.

Just the other day when it was 80 degrees, ESS was operating literally within blocks after leaving the house from a cold start. I find it to working very well now that the weather is warm.

For what it is worth the vehicle has one winter and one summer on it with 11000 miles.

I am coming to believe cold weather is where the weakness of ESS is.
 

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Well said. This is pretty much how mine works. In cold weather I may have to drive 15 or 20 miles before ESS becomes operational (that is to say leaves the battery charging mode). Otherwise, the vehicle is fully warmed At first I thought the battery was fishy or something really depletes the battery in cold weather.

Just the other day when it was 80 degrees, ESS was operating literally within blocks after leaving the house from a cold start. I find it to working very well now that the weather is warm.

For what it is worth the vehicle has one winter and one summer on it with 11000 miles.

I am coming to believe cold weather is where the weakness of ESS is.
EXACTLY how mine works as well. hopefully I'll be able to get a nice heavy duty replacement when I replace both batteries maybe that will help
 

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hi pacy owners first post here:
Bought a 2018 pacifica last year May 2018, a lower trim one but with S package. start stop feature works great until one year later last week it just suddenly stopped on an intersection. It was a stop light, when we're about to go the car wont start. so i turned it off and started again and it started but i get the warning A on the dashboard saying auto star/stop not working. was not able to go to the dealer and drove it for 2 weeks without the autostart/stop feature. Today suddenly it won't start. light turn on but it does not start. tried to jump start the same. tried autostart from key still the same it will not start. called dealer but i can't setup an appointment since it is Sunday. My question is how do Chrysler deal with this issue? would they tow my car? who pays for it? we did not buy extended warranty and it's just been a year since. This is our first Chrysler. Thank you
 

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hi pacy owners first post here:
Bought a 2018 pacifica last year May 2018, a lower trim one but with S package. start stop feature works great until one year later last week it just suddenly stopped on an intersection. It was a stop light, when we're about to go the car wont start. so i turned it off and started again and it started but i get the warning A on the dashboard saying auto star/stop not working. was not able to go to the dealer and drove it for 2 weeks without the autostart/stop feature. Today suddenly it won't start. light turn on but it does not start. tried to jump start the same. tried autostart from key still the same it will not start. called dealer but i can't setup an appointment since it is Sunday. My question is how do Chrysler deal with this issue? would they tow my car? who pays for it? we did not buy extended warranty and it's just been a year since. This is our first Chrysler. Thank you
Hello theddyg,
We are sorry to hear about this concern you are experiencing with your vehicle's start stop feature. Have you been able to schedule an appointment at your dealership? Please send us a private message if you would like an additional layer of support addressing this concern.
Jenn
Chrysler Social Care Specialist
 

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Try cleaning the battery terminals. Mine had a recall for power steering failure but it was actually a problem with the battery terminals. The recall repair is to clean the battery terminals. Prior to the repair, ESS rarely worked. Since they repair, it works all the time.
 

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The recall for the power steering sealer that accumulates on the wire harness tab and causes loss of clamp load in the battery ground joint is what they call the V53 Recall. I'm having that recall fixed next Tuesday. I am anxious to see if this fixes my ESS problems. I have 20K miles on my '18 Pacifica Touring L now and the ESS hasn't worked properly since shortly after it was new. The ESS occasionally works but at a stop sign, it shuts off only for a few seconds and then restarts even with my foot remaining on the brake. I attribute this to the firmware thinking that the AGM battery isn't charged up enough to run the car electronics for more than a few seconds while the ESS has turned off the engine. I tried charging the AGM battery with a smart charger awhile ago but it didn't help for one day.
 

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The recall for the power steering sealer that accumulates on the wire harness tab and causes loss of clamp load in the battery ground joint is what they call the V53 Recall. I'm having that recall fixed next Tuesday. I am anxious to see if this fixes my ESS problems. I have 20K miles on my '18 Pacifica Touring L now and the ESS hasn't worked properly since shortly after it was new. The ESS occasionally works but at a stop sign, it shuts off only for a few seconds and then restarts even with my foot remaining on the brake. I attribute this to the firmware thinking that the AGM battery isn't charged up enough to run the car electronics for more than a few seconds while the ESS has turned off the engine. I tried charging the AGM battery with a smart charger awhile ago but it didn't help for one day.
What was the gap between when your 2018 was manufactured vs when you drove it off the lot?
 

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The gap was 22 days. Why?
 

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The gap was 22 days. Why?
3 weeks? Wow that was quick! A lot of folks seem to have issues when it's sat on the dealer lot for a bit, which may mean it's battery related, but you got yours before the transport train was barely stopped. :p
 

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So, my latest experience with ESS. I drove over 500 miles on interstate and ESS was working as it is supposed to. It then sat for three days. I drove it about 6 miles and I got the NOT READY message. Then I shopped for a bit and restarted the car for the 6 mile return trip. After about 4 miles ESS became functional.

My experience at home is that ESS comes on after about four miles in warm weather.

Not idea if this means anything but that is what happened. Tomorrow I leave on the 500 mile return trip so we will see what happens.

The upshot is I do not understand what parameters govern ESS operation and what is normal and what is not. The dealer and manual give no real reliable information.
 

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So, my latest experience with ESS. I drove over 500 miles on interstate and ESS was working as it is supposed to. It then sat for three days. I drove it about 6 miles and I got the NOT READY message. Then I shopped for a bit and restarted the car for the 6 mile return trip. After about 4 miles ESS became functional.

My experience at home is that ESS comes on after about four miles in warm weather.

Not idea if this means anything but that is what happened. Tomorrow I leave on the 500 mile return trip so we will see what happens.

The upshot is I do not understand what parameters govern ESS operation and what is normal and what is not. The dealer and manual give no real reliable information.
Your experience is quite different from mine. In a year and a half, I have never seen an ESS error message. I still think this has something to do with the battery quality.
 

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Hilltopper, your ESS problems are quite similar to mine. It seems like our ESS problems are not necessarily battery related as the symptoms seem to be intermittent (like a bad ground causes sometimes). Have you had the V53 Recall done yet? I'm thinking this recall will fix the ESS problems since the Auxiliary Battery eyelet ground connection seems to be what's causing or creating the intermittent problems. I'm bringing mine in for the V53 Recall in a few days so I should have the answer soon (if my theory is right).
 

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V53 done a few weeks prior to my trip so that is not it. Usually it says why ESS is not ready.
 

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We'll, so much for that theory! Is there any chance that your mechanic didn't do a good job of cleaning up that ground connection! How long did it take? Did you talk to the mechanic that did the work or not?

I know I probably shouldn't have to question your mechanic's work, but really, one look at that grounding stud and verifying that it's tight without actually disconnecting the nut and eyelets and cleaning things up will not fix anything. How else can you explain why the V53 Recall fixes all ESS problems on some cars but not others?

I'm sure you know that there are several conditions that have to be met before the ESS will even begin to work. In my case, 99% of the time it's because the Auxiliary Battery isn't adequately charged, even though testing it and charging it myself beforehand shows that it is or should be fully or almost fully charged. My point is that my ESS system seems to restart way to soon after ESS stopping, indicating to me that the Auxiliary Battery is not charged adequately or else the firmware doesn't or can't measure the state of charge of the Auxiliary Battery accurately. This is where a bad ground could rear it's ugly head.

Are your ESS problems mostly because the Auxiliary Battery is not yet charged up enough when it should be or is it like mine, where it does an ESS stop but then restarts almost immediately which I attribute to an inadequately charged Auxiliary Battery?
 
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