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Last I checked amazon had them for under $100, gotta be better than stock, obviously.
 

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Not even kidding, go Autozone Platinum. Replace both. Running a regular battery alongside of an AUX AGM battery will only kill the regular battery. When dealing with the auto start stop problem change both batteries.
 

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i also have a 2017 Pacifica. I have nothing but problems since Jan. 2019 when the ESS stopped working and drained the main battery. van has been to the dealer. they replaced the aux battery and would not replace the main battery.we keep having the same issue over and over with the ESS not working and display showing battery protection mode and or the radio unit going dark. tomorrow will make trip number 6 to the dealer to find the issue which they say they cannot duplicate or its not happening when we take it in. last week they had the van for 2 days and again said they cant find the problem and it was not happening when they had it. got the keys drove off and didnt get 1/4 mile down the road and BOOM! ESS not working again and battery in protection mode. now here i am taking it back again tomorrow.......PLEASE Chrysler do something about this
Hi blands779,

We sincerely regret to hear of your concerns persisting in your vehicle. If you'd like, please send us a private message as we would be glad to escalate a case to a specialist for an additional layer of assistance while your vehicle is in service.

Alex
Chrysler Cares
 

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my aux battery died at around 25 or 26k.


My aux battery died after 27 months (44,000 miles so not covered by warranty). Pretty weak battery if it fails in under 36 months, regardless of mileage.

The service center was also suggesting that I replace the main battery as it may have overcharged as a result of the aux battery failing. If so, that's a pretty lousy design.

Does the auto start/stop really save enough gas to justify the added weight and complexity of the overall vehicle (i.e. cost)? I doubt it. (I'm paying $225 for a new aux battery, and MAY need a new main battery as a result of the lousy design.)
 

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has anyone looked into a lithium iron phosphate battery? I mean, those should be a heck of a lot more reliable than the good old lead acid bricks...

G.
 

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Took the car to the dealer And things are interesting.
The car in front of me was another Pacifica with a similar battery problem.
When I sat with the assistant service manager I found one of the major issues....
In order to get Chrysler to approve a battery replacement under warranty you have to remove the battery from the car and connect it to a computerized charge and load tester.
A full test on a battery takes 4-5 hours, so a car with two batteries plugs up the machine for a full day. If Chrysler would approve warranty on obviously bad batteries with a shorter process they could reduce the stress on customers and dealers. My batteries will take 3-4 days to wait in line....

View attachment 42504

I think smoke with a sulfur smell from the battery is a pretty good sign the battery will not come back to life.....?. ?
I think you've got them "dead to rights" there, and I cannot conceive of a service writer just not going ahead and have the vehicle repaired properly. What a strange company Chrysler has become!
 

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I've had this problem on my pacifica. We took it to the dealer at least twice. They say they charged or replaced the battery. Issue still happens quite a bit, but I have given up on any kind of resolution.
 

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2017 chrysler pacifica Touring LX
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I have a 2017 pacifica with just over 40k on it and have ran into these same similar issues for a while now. They do all seem to steam from a failing battery but have been going on for about a year now.
First issue was I couldn't start my van one day, said it was a shifter issue on the dash but refused to move. After a few minutes fiddling I went inside to grab some tools and a scanner, came back out and all was working. I was late so let it go and forgot about it.
A few months later it happened again when parallel parking, had to inch my way into the spot as the emergency brakes kept applying them selves with "service shifter" displayed on the dash. I wasn't near my tools and was about to call for a tow when I remembered what happened before. Turned off my van and waited 5 minutes. It then started just fine and drove without issue.
I was working at a BMW dealership at the time so called a company owned chrysler dealership at the other end of town. Service writers had nothing for me, I was just over the 36k point at the time and they said they would look into it but likely not going to be covered by warranty. Had a technician from the dealer I worked at look at it but found nothing (granted he is a bmw tech not mopar) since then it has happened half a dozen times. Last week my auto start/stop light came on and hasn't gone away.
I plan to start with dropping $200 on a quality new battery. I gave chrysler another shot, was happy with the pacifica like really happy, ended up getting one for my wife too. Now I'm questioning our choice. I know issues happen but we have two kids and if a weak battery can make the car immovable then I'm not sure it's the right one for me
 

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2017 Pacifica Touring L (9/2016 Build)
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I have a 2017 pacifica with just over 40k on it and have ran into these same similar issues for a while now. They do all seem to steam from a failing battery but have been going on for about a year now.
First issue was I couldn't start my van one day, said it was a shifter issue on the dash but refused to move. After a few minutes fiddling I went inside to grab some tools and a scanner, came back out and all was working. I was late so let it go and forgot about it.
A few months later it happened again when parallel parking, had to inch my way into the spot as the emergency brakes kept applying them selves with "service shifter" displayed on the dash. I wasn't near my tools and was about to call for a tow when I remembered what happened before. Turned off my van and waited 5 minutes. It then started just fine and drove without issue.
I was working at a BMW dealership at the time so called a company owned chrysler dealership at the other end of town. Service writers had nothing for me, I was just over the 36k point at the time and they said they would look into it but likely not going to be covered by warranty. Had a technician from the dealer I worked at look at it but found nothing (granted he is a bmw tech not mopar) since then it has happened half a dozen times. Last week my auto start/stop light came on and hasn't gone away.
I plan to start with dropping $200 on a quality new battery. I gave chrysler another shot, was happy with the pacifica like really happy, ended up getting one for my wife too. Now I'm questioning our choice. I know issues happen but we have two kids and if a weak battery can make the car immovable then I'm not sure it's the right one for me
Welcome to the forum.

Be sure to have both batteries checked.

If you put your van info in the signature line of account settings it will show up at the bottom of your posts and will help us answer your questions easier.
 

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Welcome to the forum.

Be sure to have both batteries checked.

If you put your van info in the signature line of account settings it will show up at the bottom of your posts and will help us answer your questions easier.
Thanks, I will be doing that for sure. I added my van into the vehicle section but didn't see a signature spot so doesn't appear to be showing. Maybe because I'm on mobile?
 

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Thanks, I will be doing that for sure. I added my van into the vehicle section but didn't see a signature spot so doesn't appear to be showing. Maybe because I'm on mobile?
On your phone: Try clicking on your icon, account settings, your account (in a box), signature.
 

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Mine was replaced under warranty, the A! yellow warning is gone, and I ended up getting the SmartStartStop device so the ESS is now disabled by default, only time will tell if the aux battery ever fails, since it won't be starting the engine anymore.

G.
 

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Mine was replaced under warranty, the A! yellow warning is gone, and I ended up getting the SmartStartStop device so the ESS is now disabled by default, only time will tell if the aux battery ever fails, since it won't be starting the engine anymore.

G.
Can you tell me more about this smart device? Both my batteries tested fine, about 12.2 volts normal and 14.2 while running. Didn't do a load test yet as I was busy and just busted out the multimeter, but next I'll take them out and get them proper tested.

Oh and the service shifter soon came on again the other day, same fix, turn off the van, wait 60 sec, turn it back on and I can drive again
... Being I'm out of warranty not looking forward to going to a dealership
 

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The SmartStartStop device link is here: Smart Stop Start

Basically it leaves the ESS at whatever setting you had it on when you shut the car off. I've read that it also takes care of the faulty ESS icon, but since I had my battery replaced prior to installing this device I cannot corroborate this is true. But the ESS is always off on my van, so I would venture to say that the aux battery will never go dead. Starting the engine is quite demanding on a battery, so doing this auto-start-stop after a while it will die...

Both my batteries were good on the multimeter, but the aux was bad. The tech also told me the dealer where I purchased reconnected it wrong (Due to COVID the dealer was closed for 2 months and the batteries disconnected) Apparently there is a special way to connect the aux battery that could throw errors if not done right... at least that is according to the tech who replaced the aux battery in my van.

G.
 
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Mine was replaced under warranty, the A! yellow warning is gone, and I ended up getting the SmartStartStop device so the ESS is now disabled by default, only time will tell if the aux battery ever fails, since it won't be starting the engine anymore.

G.
Can you tell me more about this smart device? Both my batteries tested fine, about 12.2 volts normal and 14.2 while running. Didn't do a load test yet as I was busy and just busted out the multimeter, but next I'll take them out and get them proper tested.

Oh and the service shifter soon came on again the other day, same fix, turn off the van, wait 60 sec, turn it back on and I can drive again
... Being I'm out of warranty not looking forward to going to a dealership
The SmartStartStop device link is here: Smart Stop Start

Basically it leaves the ESS at whatever setting you had it on when you shut the car off. I've read that it also takes care of the faulty ESS icon, but since I had my battery replaced prior to installing this device I cannot corroborate this is true. But the ESS is always off on my van, so I would venture to say that the aux battery will never go dead. Starting the engine is quite demanding on a battery, so doing this auto-start-stop after a while it will die...

Both my batteries were good on the multimeter, but the aux was bad. The tech also told me the dealer where I purchased reconnected it wrong (Due to COVID the dealer was closed for 2 months and the batteries disconnected) Apparently there is a special way to connect the aux battery that could throw errors if not done right... at least that is according to the tech who replaced the aux battery in my van.

G.
Thanks for that! I'll see if I can get some more info on the diy method, worst case I'll go to the dealer, just a shame to be dealing with this common issue at low miles yet out of warranty.
Do you know if the smart start/stop is just reflashing the computer or is it an actual new module added into the vehicle? As in is it software or hardware?
Thanks!
 

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Thanks for that! I'll see if I can get some more info on the diy method, worst case I'll go to the dealer, just a shame to be dealing with this common issue at low miles yet out of warranty.
Do you know if the smart start/stop is just reflashing the computer or is it an actual new module added into the vehicle? As in is it software or hardware?
Thanks!
Its a device/(small box) that taps into what looks like a data line at the rear USB charging ports... I don't know how the internals work. All I know is that since installing it I've never had to deal with pressing the ESS button ever again to shut it off. As soon as you start the van it automatically disables ESS if you had it disabled when you shut the van off. You can still use the feature if you turn it back on.

Maybe some other members can chime in with more detailed information about how the device actually works.

G.
 
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Demkantor, If your batteries tested 12.2 volts they are not ok. A fully charged 12 volt battery will have a voltage of at least 12.6 volts. This ideally measured with the terminal connections removed. With your van being a 2017 I would fully suspect it's batteries to becoming to their end of life. It seems like the the Pacifica is very hungry for electricity and consumes batteries at a rate higher than traditional automobiles of just a few years ago and may be associated with the design of it's Engine Start Stop system.

I'd suggest taking one of your batteries, maybe start with the aux battery to a auto parts store to have it load tested to be sure.
 

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I've had the "start stop unavailable" orange warning light for a long time in our 2017. It used to be on super hot days, then it was once a week, then it just became a constant thing.

Since I never used ESS I ignored it. Now I'm trying to get the van ready to sell and I want the issue resolved. Had it at the dealership yesterday for interval service and asked them to take a look at ESS. Their answer: "the aux battery went bad and 'took out a sensor with it', it will be $650." I chuckled at this and left without addressing it. Bought an aux battery at OReilly auto parts for $100. Disconnected all four battery terminals (that step is important!) and let it sit for 5 minutes. Tied batteries back on - and the ESS warning is gone. "Took out a sensor" - what a scam.

In case you're wondering why I'm selling it - I've also had the "doors won't close" issue, and the "hard shift" issue, and the "instrument cluster randomly goes black" issue. No more Chryslers for this family.
 

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2018 Pacifica Touring L + S
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I've had the "start stop unavailable" orange warning light for a long time in our 2017. It used to be on super hot days, then it was once a week, then it just became a constant thing.

Since I never used ESS I ignored it. Now I'm trying to get the van ready to sell and I want the issue resolved. Had it at the dealership yesterday for interval service and asked them to take a look at ESS. Their answer: "the aux battery went bad and 'took out a sensor with it', it will be $650." I chuckled at this and left without addressing it. Bought an aux battery at OReilly auto parts for $100. Disconnected all four battery terminals (that step is important!) and let it sit for 5 minutes. Tied batteries back on - and the ESS warning is gone. "Took out a sensor" - what a scam.

In case you're wondering why I'm selling it - I've also had the "doors won't close" issue, and the "hard shift" issue, and the "instrument cluster randomly goes black" issue. No more Chryslers for this family.
If your aux battery was dead for a long time, chances are it also took down your main battery. If you care about whoever is going to buy this from you, you should have the main battery checked also.
 

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Its a device/(small box) that taps into what looks like a data line at the rear USB charging ports... I don't know how the internals work. All I know is that since installing it I've never had to deal with pressing the ESS button ever again to shut it off. As soon as you start the van it automatically disables ESS if you had it disabled when you shut the van off. You can still use the feature if you turn it back on.

Maybe some other members can chime in with more detailed information about how the device actually works.

G.
Yes, I installed the Smart StopSmart module in my 2020 Pacifica this evening and it works perfectly. Ten minutes to install and your done. No high tech skills are required if you follow the provided instructions which are also available on their website.

Some may not be willing to pay the $129 for the module but to me it is worth every cent to rid myself of a ridiculous system that I have no faith in while sitting at a stop light. Plus, I can’t help but believe ESS wasn’t invented by a company who manufacturers starters and is looking to increase sales...the entire idea just seems ridiculous.

The bottom line is it is easy to install, it works and it is not permanent as you can always remove it or unplug the wire in the lower access panel whereupon all will return to factory settings but I’ll bet you won’t. As for voiding the warranty, I’ll cross that bridge if I ever come to it but am not worried. I know four other guys who have them in their Jeeps and zero issues.

Only one warning: They won’t ship to the People’s Republic of Kalifornia. They are illegal as their politicians outlawed them.
 
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