Car does not shut off

[dfad]

Why does my 2025 G80 sometimes not shut off? I stop, push the P button in the middle of the gear selector knob, press the stop/start button. I exit the vehicle and press the lock button key fob and nothing happens. I get back in car and it is still running. I would estimate 1 time out of 20.
Very dangerous. Wondering what I am doing wrong?

 

[EdP]

Why does my 2025 G80 sometimes not shut off? I stop, push the P button in the middle of the gear selector knob, press the stop/start button. I exit the vehicle and press the lock button key fob and nothing happens. I get back in car and it is still running. I would estimate 1 time out of 20.
Very dangerous. Wondering what I am doing wrong?

Doubt it is you. Could be a defective button or whatever it is connected to. I'd see the dealer. Unsafe if you garage it.

 

[BillZ]

Why does my 2025 G80 sometimes not shut off? I stop, push the P button in the middle of the gear selector knob, press the stop/start button. I exit the vehicle and press the lock button key fob and nothing happens. I get back in car and it is still running. I would estimate 1 time out of 20.
Very dangerous. Wondering what I am doing wrong?

One possibility is that when you stopped, the car's auto stop/start system had already turned the engine off. If your foot is on the brake pedal when you then press the stop/start button, you may have in fact re-started the engine. I'm surprised you wouldn't hear the engine running on these occasions as you're exiting the car and before you hit the lock button on the key fob. Anyway, this is just one possibility.

 

[Jhon]

That should not happen. I usually do not hit the park button, I just shut off the engine and it does the park thing by itself.

 

[NVQB10]

Genesis recommends always putting the parking brake on (I regularly forget). Does car chime when you open door with it running? Mine does.

 

[Jhon]

Genesis recommends always putting the parking brake on (I regularly forget). Does car chime when you open door with it running? Mine does.

Nothing to do with your issue., but, when I park on a incline, even a slight one like my driveway, I put the parking break on before I take my foot off the break or shut off the engine. Some years back when I had a different car, I parked on a steep slope. When I went back to my car, I was not able to get my car out of gear. My brother in law said he wanted to try something. He rocked rock my car forward and back and when it went forward he said to to try to take it out of gear. It worked. Ever since that, I would put the break before I took my foot off of the break or put the car in park to prevent that from happening. Something to do with it locking up something.
And yes, my car makes a lot of noise when I open the door with it running and screams if I get out of the car and close the door when it is running.

 

[Ernie3647]

Nothing to do with your issue., but, when I park on a incline, even a slight one like my driveway, I put the parking break on before I take my foot off the break or shut off the engine. Some years back when I had a different car, I parked on a steep slope. When I went back to my car, I was not able to get my car out of gear. My brother in law said he wanted to try something. He rocked rock my car forward and back and when it went forward he said to to try to take it out of gear. It worked. Ever since that, I would put the break before I took my foot off of the break or put the car in park to prevent that from happening. Something to do with it locking up something.
And yes, my car makes a lot of noise when I open the door with it running and screams if I get out of the car and close the door when it is running.

I can't remember well but I though my 2021 would automatically put the brake on in even the slightest incline or decline as my 2025 does. Does it?

 

[Jhon]

I can't remember well but I though my 2021 would automatically put the brake on in even the slightest incline or decline as my 2025 does. Does it?

It does on most inclines but not slight ones like my driveway. But it happens after the car is turned off and it roll's back on the transmission check before the break comes on.

 

[Ernie3647]

It does on most inclines but not slight ones like my driveway. But it happens after the car is turned off and it roll's back on the transmission check before the break comes on.

My driveway has a slight incline have to check that procedure thanks.

 

[JohnnyBs25Prestige3.5T]

Some years back when I had a different car, I parked on a steep slope. When I went back to my car, I was not able to get my car out of gear. My brother in law said he wanted to try something. He rocked rock my car forward and back and when it went forward he said to to try to take it out of gear. It worked. Ever since that, I would put the break before I took my foot off of the break or put the car in park to prevent that from happening. Something to do with it locking up something.

Without the parking brake applied, when a car (with automatic transmission) is parked on a slope, all of the gravity-induced force what would cause the car to roll down hill is instead applied to the parking pawl inside the transmission (analogous to putting a broom stick through the spokes of your bicycle wheel to prevent it from spinning). The steeper the slope, the more force is being applied to the pawl, increasing the friction between it and the rotating component mechanically tied to the drive wheels, making it harder to "pull the stick out" to get it out of "PARK". Releasing that force by rocking the car allows it to be shifted out of PARK. Its not clear to me if modern electronically-shifted automatic transmission have this problem too.

I've found that when pulling into a parking spot, if I hadn't disabled auto-stop, the engine will shut off as soon as the car stops rolling. Then, as soon as I press the PARK button, the engine restarts, requiring a press of the START button to turn the engine back off (I hate when this happens). I've also found that if instead of pressing the PARK button after the engine auto-stops, I just press the START button, it will automatically shift to PARK without restarting the engine first. A few times I forget what mode the auto-start function is in and instinctively press the PARK button just as it is auto-shutting down then I try to hit the START button before it starts back up (in delayed response to pressing PARK) and the engine will restart. So if the timing of those two button presses is just right (or rather, wrong), this can result in an unanticipated situation with the engine running in PARK after you think you've shut it off.

I'm trying to get into the habit of just pressing the START button when parking and NOT pressing the PARK button, which will result in the engine being off regardless if auto-stop has been disabled or not. I'm finding old habits die hard.

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[dfad]

Thanks for responses. However, my issues are when parking in a Home Depot parking lot or my own garage; no incline issues at all. Car is perfectly flat, press P button & then start/stop. I will say the dash is not going blank but the shutdown process is so routine that I am not really paying attention.
Is it possible there is a minimum time delay required between pushing P and then the stop/start?

 

[JohnnyBs25Prestige3.5T]

Thanks for responses. However, my issues are when parking in a Home Depot parking lot or my own garage; no incline issues at all. Car is perfectly flat, press P button & then start/stop. I will say the dash is not going blank but the shutdown process is so routine that I am not really paying attention.
Is it possible there is a minimum time delay required between pushing P and then the stop/start?

I'm sure the parking on incline / reluctance to be shifted out of PARK side issue (not initially raised by you) has nothing to do with the issue of timing the PARK and STOP/START button presses affecting the apparent randomness of the engine running state after that button sequence. I think it would be safe to assume that there is some delay required between pushing PARK and STOP/START that ensures the engine is left in the OFF state, but knowing how software works it is likely a random delay that changes each time. Its probably less than 1 second. For sure, if after pressing PARK you wait to press STOP/START until after waiting long enough to confirm the engine is still in an ON state, you can avoid inadvertently re-starting the engine.