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Battery problem?

HowiejeepL

New member
Hi. I bought my ‘21 Cherokee back in August of ‘21. After some time the car wouldn’t start one day. Brought it in they said the battery just needed recharging? It happened a 2nd time some time after and it took a while for it to get jumped. It seemed like had to wait for everything to come in line. That visit they said it was the auxiliary battery drawing from the main battery. Not sure if it happened one more time before my most recent encounter where I was away for a week and sure enough wouldn’t start. It took me a little over a week before I brought it in because of the holiday with family coming in and may have needed the extra car. So I used that time to talk to friends in the business and even brought it to my personal mechanic and like everyone else said it’s gotta be the battery. Hooked his tester up to it and it said it failed. So when I brought it in I told them all that. Told car is ready but everything checks out. Told them to keep it overnight. Still they say everything ok. Well right now I’m letting the car sit for two days and trying to start it. If it starts then 3 days next week and so on up to a week. Taking photo of the mileage with time stamp to prove car not driven. Any adobe on what this is or how to handle dealership is much appreciated. Thanks.
 

Boggswade

Well-known member
There is a TSB out about the rear hatch sensor being faulty and draining the battery. Have them check that.
 

jeepgrady

Well-known member
There was also an RRT issued that the amplifier isn't powering down entirely. It's a software update
. Don't know if it pertains to your vehicle.
 

Sarge

Well-known member
I'm trying to figure out how to fit an H8 Odyssey battery in mine. 950CCA vs the 650CCA of the stock H7, and in the WK2 all that was required was a different bracket. Looking at the WL, there's room for the H8, and it's the same situation: You just need a different bracket. All that said, if you have a drain issue, any battery will get run down eventually.
 

Jrseidel

Well-known member
Ok thanks.
Were they able to solve this issue? I have the same problem in my '21 Overland with 18,000 miles. Seems possible it could be amplifier drain or rear hatch. Service department doesn't seem to know where to start.
 

MotownBob

Well-known member
I had both batteries replaced after I had my 21 towed in, I was so dead that I had to use the key to get in. It was described as a bad cell.
 

Korros1v3

Well-known member
Are 21 Overland GCL since the dealer fixed the carplay with and update cycles the lights non stop. Anytime you enter the garage the damn thing lights up. I turned off the headlight portion of this....now only the doors light up and inside lights. It would cycle for hours like this...even if you were not in there. it eventually killed the battery. I had to jump start it with my jump box. The next time this happens it going back.
 

bzjeep

Active member
So crazy that this thread is so fresh! Our 21 Limited (22k miles), purchased in October of 21 woke up dead the other morning. Took some time to jump it and Autozone's tester failed in addition to pulling a CEL for the BCM. After an afternoon at the dealer, both batteries passed multiple times so I picked it up; however, now the Service ESS light is on. I'll have to bring up the TSB and potentially the amplifier issue when I take it back in to have them address the service light.
 

bzjeep

Active member
I wanted to update you all on my experience. I dropped off my vehicle yesterday morning and they stated that they would flash the software and re-test the aux battery in addition to checking out the TSB for the PLGM drain. Turns out that it does need to be replaced, so they've ordered it and in the meantime, they gave me a 23 Wagoneer Carbide as a loaner!
 

Korros1v3

Well-known member
ours died again over the weekend. Had the car loaded and ready to go for my sons graduation party. Car wanted us to use the keyfob to push the start button. But as soon as you did that it just went dark. we borrowed our neighbors truck and after the party I tried again to put the jump box on the car to start it. jump box would not get it started. So I pulled out the plug in charger/starter and let it bring it up from 7.7 volts to above 12.4. Boom the car started...but was not happy at all. Eventually everything corrected itself and the check engine light went away. I guess we need to take it in and figure out why this thing has died twice now since the last software upgrade to fix car play. unreal. Worried about getting stranded all the time now.
 

JeepCares

Well-known member
ours died again over the weekend. Had the car loaded and ready to go for my sons graduation party. Car wanted us to use the keyfob to push the start button. But as soon as you did that it just went dark. we borrowed our neighbors truck and after the party I tried again to put the jump box on the car to start it. jump box would not get it started. So I pulled out the plug in charger/starter and let it bring it up from 7.7 volts to above 12.4. Boom the car started...but was not happy at all. Eventually everything corrected itself and the check engine light went away. I guess we need to take it in and figure out why this thing has died twice now since the last software upgrade to fix car play. unreal. Worried about getting stranded all the time now.

Hi there. If you continue to experience concerns and want to discuss with our team further, please send a private message.

Kate
Jeep Cares
 

bzjeep

Active member
Final update on our battery issues. Turns out, when I originally had my batteries tested, they didn't finish reconnecting the aux battery which resulted in the Service ESS light coming on. They resolved that and replaced the PLGM. We've had the vehicle back for a few weeks now and no battery issues. Interestingly, the ESS actually functions now as for months, it had rarely been killing the engine when stopped.
 

Juggernaut

Well-known member
I posted this elsewhere but it also fits here so I will add to this thread. A few weeks ago my 21 GCL Limited with about 15000 miles on it started acting flakey. When I approached it with its key fob it started honking as if I was pressing the keyfob buttons even though I wasn’t. It did that with the doors open or closed. It didn’t matter. It did it several times. I thought the key fob might be bad so I tried carrying the secondary key fob and the same thing happened. I left it parked for the night and then it was used the next day w no issues whatsoever. The day after that it was totally dead and had to be towed to dealership. I was originally told they might not look at it fir 3 weeks to a month because they were buried w appts. They ended up getting to it that day and checked it all over and said just a dead battery, nothing was wrong with the truck. I asked if they were sure and they said yes we went through everything and it’s fine. Well two weeks later I go on vacation down south and the truck starts flaking out a few days before 4th of July. I bring it to the nearest dealership who confirmed the issue by walking up to the truck and away from it while holding the key job. They squeezed the truck in that day and said they found a bunch of error codes and they believe it’s a bad switch and a bad rear hatch handle. Not the motor for hatch, but the handle. They confirmed it definitely would have died in a matter of days. They couldn’t say how long it would have been before it would have died but said it definitely would have died soon. I didn’t want to get stranded on the way home so I left it there and had to get a rental to go through several states to get back home. The truck has to be shipped home when it’s done. I’m hoping they solve the mystery because I no longer trust taking the truck very far. Sad to have to say that about a truck I bought new and it’s not that old. It’s just proven itself to be unreliable the local dealership has proven that it’s service department is lackluster and basically incompetent. I also had a problem with a bad resonator that made the truck sound awful it sounded like a loud metal grinding sound. It took about 7 months for the part to come in and it to be fixed. That was after 2 snafus over a few months by the dealer saying the part was in when it apparently wasn’t. The third row seat also had gotten stuck in the up position and needed a new release handle to fix that problem. I had also brought it in two previous times for the auto start feature not working. Both times I was told the second battery just needed to be recharged. I asked why wasn’t it replaced the second time around being it’s the second time it failed. I was told that was protocol. I pretty much no longer believe what the local dealer says. I was impressed with the dealership I had to go to while on vacation though. They took interior panels off and were tracing wires and checking connections. They did this the same day I brought it in even though it was right before the holiday and they were short staffed. I actually wish they were my local dealer.
I was aware that there might be some issues with a new model year but it has become very frustrating when dealing with an incompetent dealership. I believe this battery issue should have been solved the first time I brought it in, instead of being told we checked it over everything is fine, there is nothing wrong with it that would have caused your battery to die. When the truck runs good and functions properly I love it. It rides great, and looks awesome. I love the features. I just wish it was reliable and trouble free. Like I said I would even forgive some hiccups but I expect a dealership to be able to solve problems not ignore them or be unable to fix them. It also seems I am getting constant recall notices even though it’s been at the dealership a few times lately between the resonator issue, regular service and the battery issue. I’m getting used to the dealer saying well there is a recall but the parts aren’t available. That’s been frustrating as well.
 

MotownBob

Well-known member
I had that strange honking behavior with mine too. And it happened just before the no start tow to the dealer . Since I had both batteries replaced, Everything is a ok...for now.
 
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