Auto Start/Stop Not Working

[TristanFlores]

Hi everyone,

I have a 2021 SX AWD and the auto start/stop feature stopped working about a few months ago. I bought the car in July 2020 and it worked fine ever since. When I turn my car on the button on the center console to turn it off/on is selected as on. So the center console button is not lit. When I come to a stop at a stoplight the icon on my dash turns on as orange instead of green. And the center console button lights up. Even when I press the center console button to turn it back on my engine never shuts off.

I've read that there needs to be certain criteria met in order for this feature to work. And I've checked for everything except the battery. I have a hunch that there isn't enough juice in the battery or there might be something wrong with it. But even if it ends up being the battery it wouldn't make sense since I bought the car 1.5 years ago and I drive it daily.

Had anybody had this happen to them? Any advice would be much appreciated with gas prices lately. I'd love this feature to be working.

I'm also 800 miles from my next oil change so if I can't figure it out, I'll just have the dealer take a look when I get my oil changed.

 

[TxAggie]

Mine doesn't work either. Started with a different issue which has been fixed, but the Auto Start/Stop still doesn't work. Dealer claims the same thing you said, that there are lots of criteria that need to be met for it to work. Well, it worked before and doesn't work now, so something isn't right. But everything else seems to be working, and I really don't care for the Auto Start/Stop anyway.

But keep us posted on what your dealer says in 800 miles...

 

[dsmclone]

I'd pay for mine not to work. Every time I enter the vehicle I hit the button to turn it off and to turn auto brake on.

 

[sype]

You refer to the criteria required for the Auto Start/Stop to work, did you actually look them up and made sure you are meeting all of them whenever you feel it should activate? There are quite a few, and it doesn't take a lot for one of them to disable the ISG (particularly the outside temp, climate control system load, etc.). I understand it worked before, but you may simply have been very close to the limit of one of the criteria, and now you happen to be past it?

Also, if I understand correctly what you said, trying to push the button when it is orange will not trigger an engine stop... The ISG is always on by default when you turn on the car, and pushing the button once will turn it off, and pushing it a second time will turn it back on. But it won't "bypass" the criteria needed for it to actually turn of the engine.. If it lits up orange by itself, it means one of the conditions is not met, and pushing the button will have no effect on the engine (if I understand correctly what you expected to happen).

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[bruesjoh04]

It is 100% the battery.

Either charge up your battery or just be happy you don’t have to deal with the engine shutting off.

The ISG system is definitely one of the top things that people whine about here, despite the fact that it is pretty seamless and can be disabled (just not permanently without a hack or aftermarket solution).

 

[Kronusx12]

I have a dashcam that runs 24/7 and I think it keeps my battery drained slightly enough that auto start/stop never activates anymore. I don't particularly mind it either way. It worked pretty well but it was still slightly jarring IMO. I bet if I disabled my dashcam it would go back to working but I don't really care that much lol.

 

[Brochador]

Mine doesn't work either anymore which is great cause I don't need to press that button every time.

I read somewhere on FB group that if you're driving regularly smart mode it kinda does it for you, so you don't need to press that 'auto shutoff' off every time.

 

[Jaggrey]

I had that issue with mine, which is also about 2 years old. They ended up fixing some sensor near the brake pedal... I'd have to look back at the paperwork to see what it was specifically. It took them a while to figure it out, as all the other criteria for the ISG was being met. They said something about a signal that's supposed to be sent telling the engine to shut off as not being sent or not being received on the other end..... I wish I had a better memory.

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[bvj126]

Hi everyone,

I have a 2021 SX AWD and the auto start/stop feature stopped working about a few months ago. I bought the car in July 2020 and it worked fine ever since. When I turn my car on the button on the center console to turn it off/on is selected as on. So the center console button is not lit. When I come to a stop at a stoplight the icon on my dash turns on as orange instead of green. And the center console button lights up. Even when I press the center console button to turn it back on my engine never shuts off.

I've read that there needs to be certain criteria met in order for this feature to work. And I've checked for everything except the battery. I have a hunch that there isn't enough juice in the battery or there might be something wrong with it. But even if it ends up being the battery it wouldn't make sense since I bought the car 1.5 years ago and I drive it daily.

Had anybody had this happen to them? Any advice would be much appreciated with gas prices lately. I'd love this feature to be working.

I'm also 800 miles from my next oil change so if I can't figure it out, I'll just have the dealer take a look when I get my oil changed.

Mine works sporadically it didn’t work for about 2 months and suddenly started working now some days it works and others not so much

 

[varunaX]

Mines never worked either after 2 years. There is a huge thread on this somewhere else on this site. It's very common that the light is always orange and no one knows why. Like others say , it's thought that unless your battery is at 100%. And you keep it topped by driving everyday, then it will revert to orange

 

[bvj126]

Mines never worked either after 2 years. There is a huge thread on this somewhere else on this site. It's very common that the light is always orange and no one knows why. Like others say , it's thought that unless your battery is at 100%. And you keep it topped by driving everyday, then it will revert to orange

Really odd, as any other cars I’ve driven from other manufacturers don’t have this issue

 

[varunaX]

Really odd, as any other cars I’ve driven from other manufacturers don’t have this issue

People used to say it's cause it was a brand new car, dealers didn't know what was the cause. Not sure if anything has changed since then though

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[Point37]

I'd pay for mine not to work. Every time I enter the vehicle I hit the button to turn it off and to turn auto brake on.

i installed this...10 minute easily reversible install...

Autostop Eliminator for 2020 2021 2022 2023 2024 2025 Kia Telluride

This Autostop Eliminator is designed for Kia Telluride model years 2020-2025. The Autostop Eliminator will disable the auto-stop feature on your Kia Telluride

www.autostopeliminator.com

 

[G-174355]

Hi everyone,

I have a 2021 SX AWD and the auto start/stop feature stopped working about a few months ago. I bought the car in July 2020 and it worked fine ever since. When I turn my car on the button on the center console to turn it off/on is selected as on. So the center console button is not lit. When I come to a stop at a stoplight the icon on my dash turns on as orange instead of green. And the center console button lights up. Even when I press the center console button to turn it back on my engine never shuts off.

I've read that there needs to be certain criteria met in order for this feature to work. And I've checked for everything except the battery. I have a hunch that there isn't enough juice in the battery or there might be something wrong with it. But even if it ends up being the battery it wouldn't make sense since I bought the car 1.5 years ago and I drive it daily.

Had anybody had this happen to them? Any advice would be much appreciated with gas prices lately. I'd love this feature to be working.

I'm also 800 miles from my next oil change so if I can't figure it out, I'll just have the dealer take a look when I get my oil changed.

I have the same exact issue and have asked the dealer on a couple occasions and the only answer I get is that all the conditions aren't met. My car is a 2020 Telluride and after about a yr of having the car it stopped working.
It makes no sense to me that this feature only works for a limited time and never again and no one has the exact answer.
It's very frustrating!

 

[Caravan3]

When the battery is put on a charger and charged fully the stop start in 99% of the cases will activate the stop start to function .
However the kia dealers continue to insist that the cause for the function not working is the battery not being 100% ,,,,lets apply logic here - if every other function in the vehicle dependent on the battery works as it should - why not the stop /start ,
This suggests that a higher demand is placed on the battery to maintain the stop/start - if that is so and the function doesn't work as it should (after sensors are checked and battery charged - then there is an inherent shortfall in the KIA alternator to sustain the necessary charge to the battery to maintain the stop/start function .
KIA has not addressed this problem leaving tens of thousands of KIA drivers resorting to online forums to seek to unravel the mystery of the reason why their start/stop isn't working
KIA needs to get this sorted as too many people have resigned themselves to being without a function which if working properly would save on fuel and be more environmentally friendly in the cities and large towns where it is more in use .

 

[varunaX]

Agreed. I have the same 2020 model and mine hasn't worked for years now. Sadly I'm just living with it. And I drive at least 10 mins every single day to pick up the kids from school. So the claim that it's low battery from not driving often enough cannot be true.

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[varunaX]

Duplicate

 

[rcoplien]

i installed this...10 minute easily reversible install...

Autostop Eliminator for 2020 2021 2022 2023 2024 2025 Kia Telluride

This Autostop Eliminator is designed for Kia Telluride model years 2020-2025. The Autostop Eliminator will disable the auto-stop feature on your Kia Telluride

www.autostopeliminator.com

I installed that as well. Works like a charm.

 

[TxAggie]

I installed that as well. Works like a charm.

I would install this, but the issue with the battery not being fully charged has taken care of the stupid start/stop system for me. No need for the module.

 

[Nac]

However the kia dealers continue to insist that the cause for the function not working is the battery not being 100% ,,,,lets apply logic here - if every other function in the vehicle dependent on the battery works as it should - why not the stop /start' This suggests that a higher demand is placed on the battery to maintain the stop/start - if that is so and the function doesn't work as it should (after sensors are checked and battery charged - then there is an inherent shortfall in the KIA alternator to sustain the necessary charge to the battery to maintain the stop/start function .

A higher demand is placed on the battery to turn the engine over to start it, (between 400 and 1000 amps), it only takes milliamps to maintain the electronics of the stop/start function which is a very low current draw compared to cranking over the engine.

The stop/start function is working as designed, when the battery is considered not fully charged the stop/start disables so as not to further deplete the battery allowing it to achieve a full charge (if driven enough.) When the car is turned off, the battery is constantly draining due to all the electronic systems that are still powered (alarm system, key recognition system, UVO communication, etc.), its worse if you have a 24/7 camera system or other always powered accessories.

Many people (including me) do not drive enough to keep the battery fully charged and the stop/start function correctly disables. My wife also has a Telluride and drives hers substantially more than I drive mine, her stop/go works almost all the time, and I shut it off immediately if I drive her car.

I do not believe there is any inherent shortfall in the Kia alternator, increasing the alternator capacity to fast charge would likely overcharge the battery causing an early in life battery failure.

In addition overcharging a sealed-style battery can cause it to burst due to the internal buildup of gases (hydrogen). Another failure mode of an overcharged battery is a hydrogen leak, the gas accumulates inside the battery’s sealed cells causing its casing to swell and if a seal fails it leaks the hydrogen. Hydrogen gas mixed with oxygen (in the atmosphere) can be ignited with a spark or other heat source which will result in a fire or a possible battery explosion.

I prefer the current design of the charging and auto stop/start systems where it disables rather than causing diminished battery life or a fire/explosion in the vehicle.

If its really important for this system to work for you invest in a battery maintainer type charger (battery tender) that will charge the battery and maintain it in float mode so as not to overcharge the battery. This will make auto stop/start work as long none of the other signals that disable it are active.