Auto Start/Stop Not Working

[pm23]

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.

Check you battery if it is weak stop and go will not work

 

[PellyTelly]

Sharing for an additional datapoint. Purchased CPO 2021 SX in February with 14k miles. First 2k miles we put on it were all city/urban driving and auto start/stop never worked, not once. Just took long round trip from NYC to Maine and feature started working... Imagine it will stop working as vehicle returns to its ordinary routine of stop-and-go traffic.

For what it is worth, I was right. Returning the vehicle to its usual urban driving meant the auto stop start stopped working.

 

[ganseg]

Check you battery if it is weak stop and go will not work

Even if there are stored codes of battery issues, the auto stop/start won't work. After my dealer reset the stored codes (no check engine light was on), my auto stop/start went back to normal.

Someone had mentioned a transmission pump causing this problem. The dealership tech said that is not true.

 

[MrMCar]

Even if there are stored codes of battery issues, the auto stop/start won't work. After my dealer reset the stored codes (no check engine light was on), my auto stop/start went back to normal.

Someone had mentioned a transmission pump causing this problem. The dealership tech said that is not true.

There's a plethora of conditions that must be met for the Stop/Start to function. Whilst I'm not claiming to be a Kia expert (retired BMW shop owner) most are about the same. First and foremost would be the battery S.O.C., then followed on being bereft of any codes stored for battery voltage/charging issues. Also if there's some specific (each mfr. slightly different) engine/transmission/powertrain codes, that if stored would also inhibit the function.

The primary reason being should there be anything that would leave you stranded at a traffic light OR stuck on the interstate in bumper to bumper traffic, then there's what the attorney's call "exposure." Should anything untoward or serious happen (getting rear ended, comes to mind) then there's the possibility of legal action (most usually Civil) against Kia.

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[G-642201]

There's a plethora of conditions that must be met for the Stop/Start to function. Whilst I'm not claiming to be a Kia expert (retired BMW shop owner) most are about the same. First and foremost would be the battery S.O.C., then followed on being bereft of any codes stored for battery voltage/charging issues. Also if there's some specific (each mfr. slightly different) engine/transmission/powertrain codes, that if stored would also inhibit the function.

The primary reason being should there be anything that would leave you stranded at a traffic light OR stuck on the interstate in bumper to bumper traffic, then there's what the attorney's call "exposure." Should anything untoward or serious happen (getting rear ended, comes to mind) then there's the possibility of legal action (most usually Civil) against Kia.

How do I clear these codes? I have an OBD2 thing I bought from Amazon about a year ago. I bought it because I was getting a check engine light and wanted to see what the code was.

I believe I cleared codes with it to test and see if the check engine light would come back.

I know very little about cars. I mainly work in IT.

 

[ganseg]

How do I clear these codes? I have an OBD2 thing I bought from Amazon about a year ago. I bought it because I was getting a check engine light and wanted to see what the code was.

I believe I cleared codes with it to test and see if the check engine light would come back.

I know very little about cars. I mainly work in IT.

Did your code reader show you a code related to the battery before you cleared them? If not, it is still possible you had a battery code, but your reader did not show it. Some code readers only tell you what codes are emissions related (misfire, catalytic converter, etc). Which code reader did you get?

 

[MrMCar]

"Code Readers" the oft generically applied term to any scan tool that has a diagnostic interface with the vehicle. Most readers are less than $50 and will retrieve the EPA mandated stored OBD (On Board Diagnostic) codes. With the familiar sequences of: P1001 etc. Sometimes they are helpful, others nothing more than a quick look. Tantamount to the diagnosis at Triage VS: tests, scans etc. at the hospital to reveal the real nature of the issue.

I'm getting wordy, but bear with me. Then there's what I call second tier scanners, that work both sides of the OBD connector. Having the ability to scan the OBD 2 codes AND the manufacturer codes. With the manufacturer (each one is different; BMW, Honda, Kia) codes in hand one can get a better sense of what issues have cropped up and often the frequency and sometimes you're lucky to have timestamp information. Such as the engine temperature, RPM and conditions when the issue flagged.

Then there's the Pro Level tools. Be it what the dealership uses, or amazingly sophisticated ones like Autel etc. With these we can track, watch data through the Mfr. interface and not wait for it to flag on the OBD side. Clear, run tests and even program modules. (dangerous territory if you're adventurous. You can brick a module)

Back to basics; OBD codes such as P1017 can mean one thing on a BMW, yet something a little bit different on another. With all of the different manufacturers, models of cars and the plethora of engines, quite often a P Code can mean several different things. Owing to the Mfr. trying to make a Mfr. code fit the OBD code. (Translating Sanskrit to Arabic) There's also often when the Code Reader will shed a frustrating answer: "Manufacturer Defined Code." WTF?
This is when there's something wrong but falls outside the mandated OBD requirements. (most have about twice as many as the OBD regulation mandates. To help the technician) Unless you have something more sophisticated, you're left scratching your head.

Mind you that the OBD codes are (mostly) things that can increase air pollution. As mandated by the EPA. If your AWD system goes wonky and they have diagnostic interfaces for it, it will NOT show up under OBD codes and a simple reader. Same goes for some charging issues. Unless, it creates more pollution. Like a too cold thermostat would.

Lastly only the more sophisticated tools will be able to have a conversation with ALL of the modules on a vehicle. Sometimes what may be inhibiting stop/start might not be present with the engine or transmission alone.

Way more than you ever knew about scan tools. There's a LOT more (things like Mode$06) but we'll leave it at that for today.

 

[G-250155]

Same complaint as everyone else. 2020 Telluride start stop worked good for a couple of years. We drive this thing every day. I heard about low battery ran a load test and it failed. New battery same problem. Hard to believe so many would have a cause factor. Kia first time I asked wanted to know if we spilled anything on console. After they installed battery had a regular service visit said that should fix it. They didn’t even try it.

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