Start stop not ready.

[Glad_he_ate]

So my start stop has said not ready battery charging for about a week now. I drive roughly two hrs a day. One would think that it would be charged by now. I’ll be taking it in soon and will post up the findings here. It’s sitting at 14 volts constantly. My guess is the auxiliary battery is to blame… or the cold weather is causing the def heater to run a lot ?? Idk we will see

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[ShadowsPapa]

A number of Jeep owners have had bad batteries.
Mine says that a lot in cooler weather but we've not reached that point yet here, oddly enough.
When is says ESS not ready, battery charging" it can take over an hour driving before it starts working.
Charging voltage is different from battery status........... I'd have it diagnosed. We've seen more than one person with both batteries ending up dead after a while. Good to check it out.

 

[johnparjr]

I had that issue with my JL and now also with my JT for the JL they replaced the batteries and I was good. I have an appointment for this in two weeks with the dealer been going on for over two months and charging the battery does not fix it

 

[jbehrn]

FYI it may not be the battery. I had the same issue and battery was fine, a tech diagnosed the issue as a calibration problem that resulted in ess not being able to measure the auxiliary battery charge. The tech performed a calibration reset that allowed the ess to recognize that the auxiliary battery was charged. The calibration fixed the issue and it has worked since then.

 

[ShadowsPapa]

FYI it may not be the battery. I had the same issue and battery was fine, a tech diagnosed the issue as a calibration problem that resulted in ess not being able to measure the auxiliary battery charge. The tech performed a calibration reset that allowed the ess to recognize that the auxiliary battery was charged. The calibration fixed the issue and it has worked since then.

Yeah, there's another point - and that's one reason to let the dealer "diagnose" - you're right, could be the sensor or some other piece of the system. If it's the battery, it can leave you stuck, if it's not, it's still a simple fix that should be done.

 

[Glad_he_ate]

I’ll be calling tomorrow to get it back in to check out.

 

[IanNubbit]

If you happen to look, I'm guessing you have an "Early" MY21 JT. about late 3rd QT 2021 Mopar finally found a reliable battery for all the different AUX battery implications. Its been in all the new vehicles since and has been used to replace all if found bad.

 

[sass JT]

Honestly I’m super happy when my start stop doesn’t work. Lol

 

[Glad_he_ate]

Honestly I’m super happy when my start stop doesn’t work. Lol

I shut it off every time get in however I like things to be in operational condition.

 

[j.o.y.ride]

Consider yourself lucky. Factory start/stop kill.

 

[sass JT]

I shut it off every time get in however I like things to be in operational condition.

I have a tazer so I can shut mine off but I’m with you… I like keeping things working too… good luck sir

 

[MCATDT]

Had this issue in my 2020. Ended up needing both batteries replaced in a vehicle just at a year old at the time. Batteriy life has probably been the biggest issue in both my JK and now JT. My JK needed 2 new batteries in a 3 year period and now my JT is on track to match that.

 

[Jeep-A-Kneez]

I too am experiencing a start/stop system failure. Check engine light came on, service department said batteries were good but code indicated egr sensor. Part has been on order for over two weeks, might be held up in that new FedEx Deep Gully Distribution Center.

I also would rather everything be operating as it should, however I've enjoyed not having to bother with switching the system off every time I head out.

 

[Glad_he_ate]

Appointment made for tomorrow. We will see

 

[DirkG]

My battery was dead this morning and after I jumped it and drove around for an hour or so, it said Start/Stop Not Ready for most of the drive. Then I got some gas, the JT started up just fine, but now it says Start/Stop failure and needs to be serviced. Like others have mentioned, free Start/Stop kill, which I think I'll enjoy, but I'll probably have it looked at to be sure.

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