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White Rubi

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So I just bought my JL used and it had the ESS light on which I was fine with. I recently used the JScan to change my tire size and unlocked the navigation. Since then the ESS light went off and the engine stops at red lights again. What did I do wrong and how do I fix it?
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It’s possible that the Jeep’s batteries are on the fritz and sitting on a dealer lot exacerbated that problem. Then after driving it for a while and using the JScan, the batteries got enough of a charge for ESS to start working.

Fortunately you’re not stuck with it. You could buy a product like Smart Start Stop, a JL Tazer, or something else to disable it. Or disable the aux battery altogether (search the forums).
 

jeepoch

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Not to sound incredulous, but I'm amazed that people will spend hundreds and consume considerable hours to do anything except press the little dashboard disable button.

Also the EVIC on the cluster has a page to show ESS status. Typically when the ESS stops working for me, the reason given is usually "Battery Charging" or "Battery Protection Mode" which is a great indicator of an aging battery. Either the Main or the Aux (or both).

I just recently replaced my main and the ESS has started working properly again.

For the record, I don't mind the silence when stopped at traffic lights.

Jay
 

Haberrj

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Not to sound incredulous, but I'm amazed that people will spend hundreds and consume considerable hours to do anything except press the little dashboard disable button.

Also the EVIC on the cluster has a page to show ESS status. Typically when the ESS stops working for me, the reason given is usually "Battery Charging" or "Battery Protection Mode" which is a great indicator of an aging battery. Either the Main or the Aux (or both).

I just recently replaced my main and the ESS has started working properly again.

For the record, I don't mind the silence when stopped at traffic lights.

Jay
This is so true about the money people spend to disarm ESS. All I did was lift the hood and unplug it. I don’t mind that little notification light on the dash.
 

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White Rubi

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This is so true about the money people spend to disarm ESS. All I did was lift the hood and unplug it. I don’t mind that little notification light on the dash.
What did you unplug I'm new to the Jeep scene.
 

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So I just bought my JL used and it had the ESS light on which I was fine with. I recently used the JScan to change my tire size and unlocked the navigation. Since then the ESS light went off and the engine stops at red lights again. What did I do wrong and how do I fix it?
You can...unlock nav?
Well that's pretty neat!
 

Haberrj

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What did you unplug I'm new to the Jeep scene.
When you open the hood you will see 2 plunger types switches approximately over the drivers side headlight. If you search on YouTube there are excellent videos that will show you how it’s done.
 

Jebiruph

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This is so true about the money people spend to disarm ESS. All I did was lift the hood and unplug it. I don’t mind that little notification light on the dash.
That little notification light on the dash is an indicator for more than a fault with ESS. Sometimes other issues like misc. misfires will cause ESS to be purposely disabled (turning on the light) before the misc. misfires trigger their own alert. By causing the light to be on all the time, you may miss out on important notifications.
 

SilverSurfer

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Also the EVIC on the cluster has a page to show ESS status. Typically when the ESS stops working for me, the reason given is usually "Battery Charging" or "Battery Protection Mode" which is a great indicator of an aging battery. Either the Main or the Aux (or both).
How can I get to this page you are referring to that shows the ESS Status.
 

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Haberrj

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That little notification light on the dash is an indicator for more than a fault with ESS. Sometimes other issues like misc. misfires will cause ESS to be purposely disabled (turning on the light) before the misc. misfires trigger their own alert. By causing the light to be on all the time, you may miss out on important notifications.
You are probably correct no doubt. This is my 5th Jeep my 4th 4 door unlimited. To tell you truth if I had known about this 2 battery system that controls the ESS and any other functions I certainly would not have bought it. After reading on this form all the headaches that this system can cause I am seriously thinking of getting rid of it, and to make matters worse the techs at the dealers can’t even fix them when anything happens. I am quite sure other makes have their issues also but nothing compared to what I have been reading here. Anyway love the Jeeps just can’t handle all the crap that seems to be on with the new ones.
 

bthomp

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How can I get to this page you are referring to that shows the ESS Status.
It's on the center console menu options. Scroll past tire pressure, gas mileage, and eventually you get to a ESS status page.
 

aldo98229

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Pressing the ESS button is NOT going to give your batteries extended life. The OE batteries are trash, ESS button or not.

The sooner you replaced those batteries with an aftermarket brand, the fewer problems you will have, and the greater peace of mind you will enjoy.
 

Yawnie'sPapa

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Pressing the ESS button is NOT going to give your batteries extended life. The OE batteries are trash, ESS button or not.

The sooner you replaced those batteries with an aftermarket brand, the fewer problems you will have, and the greater peace of mind you will enjoy.
True - keeping them charged, topped off, will extend the life.
Short drives - 30 minutes or less, letting it sit for days at a time, stuff like that - that's battery killers.
Worse on these OEM Jeep batteries, but bad for ANY battery.
Even if you buy great batteries for your Jeep - the best thing you can do for them is to drive the vehicle, not let it sit, and don't drive it 30 minutes a day and park it.
If you don't drive it and have a commute to work that is so short you could walk or use a bike, then you need a battery tender.

IMO, lifespan of an original Jeep battery is going to be roughly 3 years and that's if you don't let it sit, or if you drive it enough.

It truly is amazing that people spend hundreds to disable something that simply annoys them, no other valid reason.
 

Haberrj

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Pressing the ESS button is NOT going to give your batteries extended life. The OE batteries are trash, ESS button or not.

The sooner you replaced those batteries with an aftermarket brand, the fewer problems you will have, and the greater peace of mind you will enjoy.
I know that what you are saying is correct but it’s just the disappointment that I am feeling after enjoying so many good years in Jeeps. Most of the issues I have been through as the saying goes it’s a Jeep thing right. Tell me do you know what the popular replacement batteries that are being used these days.
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