It's the weather. These people are idiots. If you're worried about it, change the temp on your AC a few degrees higher and turn off re circulation. My auto start/stop doesn't work all summer
They've been taught aux battery bad, replaced to fix electrical problem. I'm on my 2nd JL, never had an issue. I do turn off Start/Stop all the time though.
This was the error when my battery died so I bet a few people had the same. Also would get “Aux Switched unavailable until battery charged” or something like that when starting it.
Just your AC demand needing to keep the engine running. Why Jeep needs to use a blaring message like this is mind boggling. My Volvo simply puts a tiny crossed out “A” and that’s it.
Auto Stop Start = ASS… but more importantly, it has some conditions where it’s disabled on it’s own, one of those being if your AC is at the higher settings, like in the summer. There was something about that in the manual…
Most of these comments are almost right, but it’s because you have your AC set on auto at a certain temperature, so the engine will stay on to run the compressor until you get to that temp. If you were to just turn the fan speed down manually or take it off auto, your engine would turn off at each stop more regularly.
That being said, I hate the start stop function. I turn it off as soon as I get in my jeep every time.
Auto stop / start sucks. It really has minimal impact on fuel efficiency and is just annoying. The best thing I ever did to my wrangler was to disable it permanently.
I was under the impression that the start / stop function has nothing to do with fuel efficiency and it's purpose is for emissions. It's how manufacturers are keeping up with vehicle emissions regulations?
None of what you said is true. Any stop longer than 7 seconds is better to turn off the engine. That’s basically every stop *except* bumper to bumper traffic situations. Also, they have a completely different starter for the ESS system that’s designed to handle the increased start cycles.
Whether it’s designed to or not, would you rather use you starter 2-3 times a day, or 30 times a day?
Most of my stops during the day are stopping at a stop sign so I don’t get a ticket, I’m not waiting on anyone. Having the engine turn off just as I’m about to let off the brake was a pain. Mine is deleted and I’m sure my starter will last longer than someone’s who isn’t
I would like to be able to manually set the amount of time required before the ESS does its thing for the exact situation you described. Very annoying to have it turn off just as you’re about to lift your foot back off the brake, if you could set the time interval to require an additional few seconds at a full stop before shutting off that would make the feature significantly more livable.
This. I would leave it on if the window was just longer, but if you come up to an empty stop sign, fully stop, just as you go to leave the engine cuts off and back on as you let off the break
I see the same message on my JL, it’s based on the current settings for a variety of accessories that run off of the aux battery when the engine is supposed to stop at for example a red light. If I for example have the temp set to 18c and the current temp is only 16c, the Jeep will not shut off when I stop at a red light, it isn’t up to temp so it prioritizes passenger comfort over the fuel saving of shutting off for 2 min. The same thing happens with any combination of accessories where the power draw maybe more than the aux battery can handle, heating, cooling, heated seats/steering wheel, stereo, etc. It doesn’t mean the aux battery is dying though that could be a possibility, I would test by not running accessories and seeing if that kicks in the stop/start. I am in my second JL and have had an aux battery fail after being submerged, the message for a failed battery was different, something like auto stop/start disabled.
As an aside I despised the stop/start feature when I got my first JL but adapted pretty quickly to it and now find it more annoying when it’s not responding as expected.
There's a bulletin for this. There's nothing you can do it's the weather. The AC is working to hard even if it's not on max. The stop start will not work if it's on max ac. If it matters that much turn the ax off at a red light. If the check engine light is not on your batteries are fine.
I’d rather not have my engine start and stop constantly than save a bit of gas. Please someone educate me if this isn’t the case, but I was always taught that the most stressful typical thing on the engine from a wear and tear standpoint is starting. The first thing I do every time I get in the car before I take it out of park is disable the start/stop.
Typically newer cars equipped with start/stop systems use a beefed up starter to compensate, though they did have trouble with that concern in the past. But regardless I simply don't care for it.
If you turn your ac off it usually works.
OR If the motors too hot ( moderate to hot temps ) , it won’t work as the engines cooling fan needs to be on to cool it at a stop .
This is not just a Jeep thing, it’s a modern car thing.
The auto start/stop will automatically disable itself if you are blasting the a/c to stay cool. If you back off the a/c from LO and full blast fan, then it will consider turning off the car when coming to a stop.
For the ac compressor to run, and make cold air, the engine must run, all cars have this. You can always throw back the top and roll em down with the ac off! Or just wait for the inside to cool down.
I was seeing this message when my A/C was keeping up. When it stopped blowing even cool air I took it in and found out the Freon level was low which lead to finding that the compressor was leaking. Not that they are 100% related but if your A/C isn’t blowing as cold as it should it might be an indicator of a problem in your cooling system.
if you have your air on full blast it will do this but once you put the air speed down one and not on blast the car will start the start stop again . It won’t engage if your air is maxed out .
Yes, if the AC is running high, start/stop won’t work. If start/stop never works, it’s time for a new aux battery. Oh, and have fun changing it. What a chore! Replaced mine after about 2 years of ownership and haven’t had an issue with start/stop since. That was back in 2021.
Do yourself a favor and keep that shit off INDEFINITELY. Most of the wear-n-tear in your car’s engine comes from start up. So just imagine the wear it’s doing every single time you come to a stop. Keep it off and change your oil every 5,000 miles regardless of anything. Oil and filters are better these days, and they claim up to 10,000 - 15,000 miles but personally I’d change it sooner just to keep your engine in top shape.
Are you blasting the A/C when you see this?
Two things: the start/stop feature runs off the aux battery (under the main battery, accessible through the passenger fender). That’s why there was a suggestion to replace it. Sometimes you’ll see a message that it’s charging which means you just need to drive for longer.
Second: the start/stop feature will not run when there is a high demand on your power systems, such as Max A/C so it will not be available then.
This message sounds like it wasn’t engaging due to running the A/C. But I also didn’t bother googling the message or asking chatGPT about it so I could be waaay off 😆
ChatGPT isn’t expertise, and it will lie to you in the most confident voice it can. Do not use AI models for expert advice. You are right that it isn’t working because climate control is needed to keep the desired cabin temps, and the message clearly states it.
Get a tazer mini and permanently turn off start/stop, it's better for your engine and you only save like 3% on fuel. Freight train? Turn the engine off yourself, 3 second stop light? I'll save my starter...
You can do an aux battery bypass if you really want to save money long term.
Check out the JLwranglerForums and welcome to the club!
Roll your windows down, it's only 75-deg outside :)
Fuel savings is not that much but I like to think I'm saving the environment and not dumping unnecessary carbon emissions sitting at a stoplight.
Start/stop feature wouldn’t work for me for a while, but didn’t really care. Took it in for separate issue and had it checked out. Was under warranty so replaced it at 25k. Went out again about 15k miles later - got the battery replaced under its own warranty.
start/stop is the dumbest 'feature' in any car. fuel saving are negligible and you cant convince me starting and stopping the engine is good for it or the starter. first thing i do when i turn on the jeep is disable it
Actually cars with start/stop starters will probably outlast a starter on a car without it. They are not used nearly as much as they are engineered to handle. That’s in addition to more starting power they give you, now the battery is a completely different story. Even with them usually having a separate battery, or separate battery pack in a single battery, the battery is going to be discharging and recharging a lot more with the alternator not putting out power when you are stopped.
Lucky, my start-stop will still try to engage with full AC on. The start stop just tears up your truck. I had the alternator fuses blow on mine with less than 1000 miles thanks to start stop.
You need to plug a battery maintainer in. The aux battery is a joke on the wrangler. I bought a Ctek unit and zero issues for the last 3 years. I live in Phoenix so currently it’s stupid hot out (114 Fahrenheit)- the jeep still does the auto stop thing without issues.
Per the Jeep service advisor, the aux battery works directly with the auto start / stop feature works. If the battery fails or doesn’t hold charge the feature will not work. So two thing :
1. I would trust a jeep advisor over commentary
2. After getting a battery tender the issue has not surfaced.
Prior to the tender, the screen from OP was constantly the case at every stop.
I know exactly how the SS system works and the OP is running his AC and the cabin temperature has not been met and that's why he got the message. You can easily test this yourself. Page 298 in your owner manual will explain this to you.
Correct - I don’t disagree that is how it’s documented on the owners manual.
My point is the configuration of the main battery and auxiliary battery is not sustainable in the long run. Hence the tender.
For reference , at around 5000 miles on the odometer, the aux battery was replaced under warranty as I was getting the jeep would never stop running at stops ( this is where they damaged the paint on the jeep). With the new battery , the system worked for about 2 weeks, Then the same issue occurred. At that point the service advisor indicated that the aux battery just wasn’t getting charged and one would have to drive 20+ miles a day to make the system work.
I opted for the battery tender and even to this day, it could be 114 out and the system works with ac running and engine off. I don’t put a lot of miles on the jeep BTW ( it’s a 2008 and now has 16k miles on it).
No not really. Most cars won’t engage the start stop if there’s a high demand on the batter/power system such as blasting AC. I personally wouldn’t worry about it at all.
This is the right answer. The Jeep is just disabling the stop/start at a light cause the AC uses too much battery. It's just a fail safe so you don't get stuck dead at a light.
I just replaced my second auto start stop battery after 5 months. Ended up buying my own at auto zone….vs another warranty claim for a shitty battery. Hopefully this works.
It's the weather. These people are idiots. If you're worried about it, change the temp on your AC a few degrees higher and turn off re circulation. My auto start/stop doesn't work all summer
Seriously, Jesus Christ I cannot believe how a simple, direct, message leads people to think there is a problem with a battery.
They've been taught aux battery bad, replaced to fix electrical problem. I'm on my 2nd JL, never had an issue. I do turn off Start/Stop all the time though.
Speaking as someone with a pooched aux battery, the message would be “battery charging” forever.
This was the error when my battery died so I bet a few people had the same. Also would get “Aux Switched unavailable until battery charged” or something like that when starting it.
This is bad advice.
Just your AC demand needing to keep the engine running. Why Jeep needs to use a blaring message like this is mind boggling. My Volvo simply puts a tiny crossed out “A” and that’s it.
This message doesn’t blare across the dash, you have to go into the screen for ESS to see this.
Wranglers are so fancy now... I'd be clueless!
I've had Jeeps that shut off at red lights. It was never by design.....
I like to think of that as an analog fuel saving feature.
Auto Stop Start = ASS… but more importantly, it has some conditions where it’s disabled on it’s own, one of those being if your AC is at the higher settings, like in the summer. There was something about that in the manual…
Most of these comments are almost right, but it’s because you have your AC set on auto at a certain temperature, so the engine will stay on to run the compressor until you get to that temp. If you were to just turn the fan speed down manually or take it off auto, your engine would turn off at each stop more regularly. That being said, I hate the start stop function. I turn it off as soon as I get in my jeep every time.
I would simply remove the doors and top and not have to worry about it
@105 where I live I won't even go to a soft top for another couple months
Yeah it hits 100 here frequently. Just gotta rock that safari top if it’s above about 50
Auto stop / start sucks. It really has minimal impact on fuel efficiency and is just annoying. The best thing I ever did to my wrangler was to disable it permanently.
I was under the impression that the start / stop function has nothing to do with fuel efficiency and it's purpose is for emissions. It's how manufacturers are keeping up with vehicle emissions regulations?
I think they go hand in hand.
It straight doesn’t help if you rarely are in bumper to bumper traffic. If anything you are wearing out your starter faster
None of what you said is true. Any stop longer than 7 seconds is better to turn off the engine. That’s basically every stop *except* bumper to bumper traffic situations. Also, they have a completely different starter for the ESS system that’s designed to handle the increased start cycles.
>They downvoted him because he spoke the truth
Whether it’s designed to or not, would you rather use you starter 2-3 times a day, or 30 times a day? Most of my stops during the day are stopping at a stop sign so I don’t get a ticket, I’m not waiting on anyone. Having the engine turn off just as I’m about to let off the brake was a pain. Mine is deleted and I’m sure my starter will last longer than someone’s who isn’t
I would like to be able to manually set the amount of time required before the ESS does its thing for the exact situation you described. Very annoying to have it turn off just as you’re about to lift your foot back off the brake, if you could set the time interval to require an additional few seconds at a full stop before shutting off that would make the feature significantly more livable.
This. I would leave it on if the window was just longer, but if you come up to an empty stop sign, fully stop, just as you go to leave the engine cuts off and back on as you let off the break
I see the same message on my JL, it’s based on the current settings for a variety of accessories that run off of the aux battery when the engine is supposed to stop at for example a red light. If I for example have the temp set to 18c and the current temp is only 16c, the Jeep will not shut off when I stop at a red light, it isn’t up to temp so it prioritizes passenger comfort over the fuel saving of shutting off for 2 min. The same thing happens with any combination of accessories where the power draw maybe more than the aux battery can handle, heating, cooling, heated seats/steering wheel, stereo, etc. It doesn’t mean the aux battery is dying though that could be a possibility, I would test by not running accessories and seeing if that kicks in the stop/start. I am in my second JL and have had an aux battery fail after being submerged, the message for a failed battery was different, something like auto stop/start disabled. As an aside I despised the stop/start feature when I got my first JL but adapted pretty quickly to it and now find it more annoying when it’s not responding as expected.
It’s because the engine is needed for a/c compressor and coolant for heat. This is the case with most cars equipped with auto stop start.
There's a bulletin for this. There's nothing you can do it's the weather. The AC is working to hard even if it's not on max. The stop start will not work if it's on max ac. If it matters that much turn the ax off at a red light. If the check engine light is not on your batteries are fine.
Imagine driving a jeep with no AC with doors and top off, the cooling starts and stops at every stop sign or stop light. Lol
I’d rather not have my engine start and stop constantly than save a bit of gas. Please someone educate me if this isn’t the case, but I was always taught that the most stressful typical thing on the engine from a wear and tear standpoint is starting. The first thing I do every time I get in the car before I take it out of park is disable the start/stop.
Typically newer cars equipped with start/stop systems use a beefed up starter to compensate, though they did have trouble with that concern in the past. But regardless I simply don't care for it.
Still screws with oiling.
It's just because you are running the air conditioning, without the engine running ac compressor isn't running.
If you turn your ac off it usually works. OR If the motors too hot ( moderate to hot temps ) , it won’t work as the engines cooling fan needs to be on to cool it at a stop .
The fans are electric. Engine doesn’t need to be running for them to turn on. The water pump is still a pulley accessory though.
Time for a dual battery setup
Just Empty Every Pocket
This is not just a Jeep thing, it’s a modern car thing. The auto start/stop will automatically disable itself if you are blasting the a/c to stay cool. If you back off the a/c from LO and full blast fan, then it will consider turning off the car when coming to a stop.
For the ac compressor to run, and make cold air, the engine must run, all cars have this. You can always throw back the top and roll em down with the ac off! Or just wait for the inside to cool down.
I was seeing this message when my A/C was keeping up. When it stopped blowing even cool air I took it in and found out the Freon level was low which lead to finding that the compressor was leaking. Not that they are 100% related but if your A/C isn’t blowing as cold as it should it might be an indicator of a problem in your cooling system.
Lol why you buy a jeep if you're worried about fuel mileage
Chances are the amount you drive will result in a negligible savings from start/stop features….
and I’m over here buying parts to disable that function…
if you have your air on full blast it will do this but once you put the air speed down one and not on blast the car will start the start stop again . It won’t engage if your air is maxed out .
Yes, if the AC is running high, start/stop won’t work. If start/stop never works, it’s time for a new aux battery. Oh, and have fun changing it. What a chore! Replaced mine after about 2 years of ownership and haven’t had an issue with start/stop since. That was back in 2021.
Do yourself a favor and keep that shit off INDEFINITELY. Most of the wear-n-tear in your car’s engine comes from start up. So just imagine the wear it’s doing every single time you come to a stop. Keep it off and change your oil every 5,000 miles regardless of anything. Oil and filters are better these days, and they claim up to 10,000 - 15,000 miles but personally I’d change it sooner just to keep your engine in top shape.
So glad my 392 doesn’t have that annoying feature.
Are you blasting the A/C when you see this? Two things: the start/stop feature runs off the aux battery (under the main battery, accessible through the passenger fender). That’s why there was a suggestion to replace it. Sometimes you’ll see a message that it’s charging which means you just need to drive for longer. Second: the start/stop feature will not run when there is a high demand on your power systems, such as Max A/C so it will not be available then. This message sounds like it wasn’t engaging due to running the A/C. But I also didn’t bother googling the message or asking chatGPT about it so I could be waaay off 😆
ChatGPT isn’t expertise, and it will lie to you in the most confident voice it can. Do not use AI models for expert advice. You are right that it isn’t working because climate control is needed to keep the desired cabin temps, and the message clearly states it.
You bought a wrangler and worried about fuel efficiency ?? Just Empty Every Pocket
I have never see that in my new JL but I just realize it because I have a 4xE
Is that one of the new hybrid electric / gas models? The 4xe model?
Get a tazer mini and permanently turn off start/stop, it's better for your engine and you only save like 3% on fuel. Freight train? Turn the engine off yourself, 3 second stop light? I'll save my starter... You can do an aux battery bypass if you really want to save money long term. Check out the JLwranglerForums and welcome to the club!
Roll your windows down, it's only 75-deg outside :) Fuel savings is not that much but I like to think I'm saving the environment and not dumping unnecessary carbon emissions sitting at a stoplight.
Start/stop feature wouldn’t work for me for a while, but didn’t really care. Took it in for separate issue and had it checked out. Was under warranty so replaced it at 25k. Went out again about 15k miles later - got the battery replaced under its own warranty.
It can be one of the signs that your auxiliary battery is dying. If you’re under warranty, get to the dealer to get it checked.
start/stop is the dumbest 'feature' in any car. fuel saving are negligible and you cant convince me starting and stopping the engine is good for it or the starter. first thing i do when i turn on the jeep is disable it
Actually cars with start/stop starters will probably outlast a starter on a car without it. They are not used nearly as much as they are engineered to handle. That’s in addition to more starting power they give you, now the battery is a completely different story. Even with them usually having a separate battery, or separate battery pack in a single battery, the battery is going to be discharging and recharging a lot more with the alternator not putting out power when you are stopped.
Lucky, my start-stop will still try to engage with full AC on. The start stop just tears up your truck. I had the alternator fuses blow on mine with less than 1000 miles thanks to start stop.
I saw that when I’d sit idle for a long time. Eventually had to replace the battery.
wrong advice
You need to plug a battery maintainer in. The aux battery is a joke on the wrangler. I bought a Ctek unit and zero issues for the last 3 years. I live in Phoenix so currently it’s stupid hot out (114 Fahrenheit)- the jeep still does the auto stop thing without issues.
This isn't an aux battery issue.
Per the Jeep service advisor, the aux battery works directly with the auto start / stop feature works. If the battery fails or doesn’t hold charge the feature will not work. So two thing : 1. I would trust a jeep advisor over commentary 2. After getting a battery tender the issue has not surfaced. Prior to the tender, the screen from OP was constantly the case at every stop.
I know exactly how the SS system works and the OP is running his AC and the cabin temperature has not been met and that's why he got the message. You can easily test this yourself. Page 298 in your owner manual will explain this to you.
Correct - I don’t disagree that is how it’s documented on the owners manual. My point is the configuration of the main battery and auxiliary battery is not sustainable in the long run. Hence the tender. For reference , at around 5000 miles on the odometer, the aux battery was replaced under warranty as I was getting the jeep would never stop running at stops ( this is where they damaged the paint on the jeep). With the new battery , the system worked for about 2 weeks, Then the same issue occurred. At that point the service advisor indicated that the aux battery just wasn’t getting charged and one would have to drive 20+ miles a day to make the system work. I opted for the battery tender and even to this day, it could be 114 out and the system works with ac running and engine off. I don’t put a lot of miles on the jeep BTW ( it’s a 2008 and now has 16k miles on it).
[удалено]
This is flat wrong. If the problem was a bad or failing aux battery, the message you’d see is system not ready, battery charging.
Really? I’ve only had the vehicle for 4 months. It has just over 1,500 miles.
No not really. Most cars won’t engage the start stop if there’s a high demand on the batter/power system such as blasting AC. I personally wouldn’t worry about it at all.
This is the right answer. The Jeep is just disabling the stop/start at a light cause the AC uses too much battery. It's just a fail safe so you don't get stuck dead at a light.
I just replaced my second auto start stop battery after 5 months. Ended up buying my own at auto zone….vs another warranty claim for a shitty battery. Hopefully this works.