Sudden Engine Cut Off!

[mcrean3]

Yesterday on my way to lunch, I had just left the office and traveled about a mile to a stop light. While sitting at the stop the engine just quit.

Did not accidentally hit the Engine Kill Button, nothing. The A/C fan, radio all remained on just the engine quit. The car is 3 months old, have had no engine related issues, just wondering if anyone has had a problem like this that has happened more than once.

I really don't want to schedule time with the dealer after just one instance, for them to tell me they found nothing. Was hoping to see if someone ran into a similar issue a few times now, took it to the dealer and hopefully found a resolution. If not I guess we will wait for it to happen again.

The car after putting it back in park, started right up and drove the remainder of the day with no issue.

Any feedback would be appreciated.

 

[homeofstone]

My best guess is that trash in the fuel stopped fuel flow or fuel pump may be faulty. However, it could be a lot of things.

 

[mcrean3]

My best guess is that trash in the fuel stopped fuel flow or fuel pump may be faulty. However, it could be a lot of things.

Thanks Homeofstone, I understand this is just a shot in the dark, just inquiring if it maybe a known internal computer problem, or like you say something just in the fuel system.

Will see if it happens again, after a second time I will then bring it in.

 

[Aquineas]

Hmmm this sounds familiar. You may be interested in the following threads:

http://www.genesisowners.com/hyundai-genesis-forum/showthread.php?t=7219
http://www.genesisowners.com/hyundai-genesis-forum/showthread.php?t=6060
http://www.genesisowners.com/hyundai-genesis-forum/showthread.php?t=2640
http://www.genesisowners.com/hyundai-genesis-forum/showthread.php?t=4459
http://www.genesisowners.com/hyundai-genesis-forum/showthread.php?t=7133

I have no idea if these are just coincidences or if there is something in common, but I thought you should be aware that it's not the first time we've heard of such a thing.

 

[mcrean3]

Hmmm this sounds familiar. You may be interested in the following threads:

http://www.genesisowners.com/hyundai-genesis-forum/showthread.php?t=7219
http://www.genesisowners.com/hyundai-genesis-forum/showthread.php?t=6060
http://www.genesisowners.com/hyundai-genesis-forum/showthread.php?t=2640
http://www.genesisowners.com/hyundai-genesis-forum/showthread.php?t=4459
http://www.genesisowners.com/hyundai-genesis-forum/showthread.php?t=7133

I have no idea if these are just coincidences or if there is something in common, but I thought you should be aware that it's not the first time we've heard of such a thing.

Excellent posts thanks, all seem to be fuel pump related. The only difference, i was able to restart the car with no further issues.

I guess we will just see if it is just a fluke, hopefully it doesn't do it on the highway or while I am heading somewhere I need to be.

Thanks for all the associated posts.

 

[T_E]

Same thing here, turning left at about 15 mph, the fire just went out.

Restarted right away, and no problem in the next 300 miles. (Nor the previous 5400 miles I drove the car)

I plugged a code reader in and no trouble present....

 

[landtuna]

Yesterday on my way to lunch, I had just left the office and traveled about a mile to a stop light. While sitting at the stop the engine just quit.

I had exactly the same problem....but not with the Genny. With my '99 Dodge pickup instead. It appears there is some sort of fail-safe mechanism in most ECM's that, if the connection to the engine is lost (called a "bus fail") the ECM will shut down the engine immediately. This happened to me 2 or 3 times and every time was during normal cruising. There were no codes thrown and it was only when it happened to my wife that she spotted a message flashing across the dash as to the "loss of bus".

The eventual problem turned out to be a bad ECM. It was replaced and all is well.

 

[sdennerATL]

A couple months ago I experienced the same problem that posters mcrean3 and Debbyfla did. I had just exited the interstate and come to a stop at a traffic light when the engine stopped. In my scenario, all indicator lights on the dash came on and the radio stayed on (can't recall A/C). I put the car in park, restarted the engine and moved through the intersection without a problem. The next day I took the car to my dealer, where they ran a diagnostic. My service writer said no errors were logged in the computer, so he couldn’t determine what had happened. He also said he had not heard of this problem before.

I haven't had any problems since, but I still don’t know what caused this problem so I worry about it happening again. The car is a 2012 with about 33,000 miles.

If mcrean3 or anyone else has any updates to share about this problem, please do. Thanks for the help.

 

[amartz]

I've had the same happen twice in 40K+ miles, with my 2012 3.8 Genny.

 

[NSXNEXT]

Moderators we need to combine the two engine cutoff threads.

I'm going with an ignition related problem. My 99 Acura TL had the very same problem (car died but radio and some other stuff stayed on). Restarted and everything was fine. The issues was solved by replacing the ignition switch.

There was a known short/bad solder joint in the switch.

If you sit in the car and without your foot on the brake, press the start button twice (accessory 2) you will see the same things are on as when the car died.

And it also does not throw a code so it makes it tough for mechanics to trace.

Ignition switch.
GM, Chrysler, Acura all having issues.

______________________________

Help support this site so it can continue supporting you!

 

[warreneaux4]

Yesterday on my way to lunch, I had just left the office and traveled about a mile to a stop light. While sitting at the stop the engine just quit.

Did not accidentally hit the Engine Kill Button, nothing. The A/C fan, radio all remained on just the engine quit. The car is 3 months old, have had no engine related issues, just wondering if anyone has had a problem like this that has happened more than once.

I really don't want to schedule time with the dealer after just one instance, for them to tell me they found nothing. Was hoping to see if someone ran into a similar issue a few times now, took it to the dealer and hopefully found a resolution. If not I guess we will wait for it to happen again.

The car after putting it back in park, started right up and drove the remainder of the day with no issue.

Any feedback would be appreciated.

Here is a post I made on April 21st.

I was driving yesterday, had just rolled the ODO over 1000 miles on my 2014 Genesis 3.8, driving 50-60 mph then as I was slowing down for an upcoming signal light it just felt funny.
As I stopped, the motor just died. I quickly hit the starter and it started right up and I had no more problems the rest of the day, about 45 miles more.

As we began to roll I patted her dash and said, "now be a good girl and please know that I have traded cars off for less". lol
Earl
Right at 3000 miles and it has not happened again.

 

[Alexp1972]

Yesterday on my way to lunch, I had just left the office and traveled about a mile to a stop light. While sitting at the stop the engine just quit.

Did not accidentally hit the Engine Kill Button, nothing. The A/C fan, radio all remained on just the engine quit. The car is 3 months old, have had no engine related issues, just wondering if anyone has had a problem like this that has happened more than once.

I really don't want to schedule time with the dealer after just one instance, for them to tell me they found nothing. Was hoping to see if someone ran into a similar issue a few times now, took it to the dealer and hopefully found a resolution. If not I guess we will wait for it to happen again.

The car after putting it back in park, started right up and drove the remainder of the day with no issue.

Any feedback would be appreciated.

My 2013 Genesis has done the same thing twice but haven't found out yet was causing it

 

[mikec]

My 2009 started the stall-while-coming-to-a-stop thing late last year. Just before the 10 year warranty expired... My car would stall just as I came to a stop at a traffic light or stop sign but only 3 to 10 minutes after a cold startup. It would restart easily every time. Sometimes it'd stall a second time at the next stop. Once past 5 minutes or so it never faltered. Some online research hinted that a dying crankshaft position sensor (CPS) could lead to stalls. Interestingly enough such failures often do not trigger the OBD II "check engine" light. The Genesis will only flag the crankshaft position sensor as bad if it's unresponsive during engine start-up. I wiggled the CPS wires quite a bit with the engine idling in my garage...no hiccups. I also unplugged the electrical connector and eyeballed the contacts: perfectly clean. After re-connecting the sensor, I drove the car for a few days and it seemed okay... just for a few days. Then it started the stall-while-coming-to-a-stop nonsense again - and again only within a few minutes of a stone-cold startup. Off to the dealer with it...

The dealer had issues reproducing the problem of course but they kept at it. For weeks. They did replace the crankshaft position sensor eventually - the tech "whacked" the transmission bellhousing (the CPS is mounted very close to the bellhousing) and one time the engine stumbled a bit. That was enough "proof" for them to decide it was the CPS. After replacing the CPS, the car never stalled again for them - and whacking the bellhousing didn't lead to issues either. So I picked up the car and it promptly stalled about half a mile from the dealership. I was able to swing around the block before they closed and they didn't argue about taking the car back again. Eventually they cycled every connector under the hood, at the engine computer, etc. After that, it worked for them for several days. And it hasn't acted up again for me either.

mike c.

 

[OUsig]

I was driving on the highway last week at 70mph when it felt like I shifted into neutral - all electronics inside and headlights were fine but RPMs went to 0. So I had to pull over on the shoulder during rush hour
Apparently the dealership has me fixed with a new fuse box as the one had a short in it. I have had a few random electrical issues recently so I tend to believe them
I pick it up tomorrow so will see!
What a pain in the rear this has been

 

[mikec]

I think my stall issue may have returned. The car was fine for a few months until this afternoon. I'd driven it about 15 miles with no issues, shopped at a woodworking store for an hour or so, then started the car to return home. It started right up. Several miles later though - with all cars squeezed into one lane on Talbert (right in front of Hyundai's US headquarters) the car shook/stumbled; it felt like a rookie stick-shift driver lugging the engine. It did it twice in succession and I noticed the "check engine" light blink a couple of times. Flashing check engine MILs are a "pull over and stop the engine immediately" issue (light coming on solid is "there is a problem but not one that'll destroy the engine in short order") and, with the construction, there was no place to pull over. So I turned into Hyundai's lot and parked in a visitor spot. The engine was idling but not as smooth as usual, a moment later it stalled complete. I have an OBD-II reader in the car (since the Genesis is my only OBD-II car, my reader stays with it rather than on a shelf in the garage) so I checked. Unlike the issue a few months ago, this time there were codes: misfire on cyl #8 (explains the rough stuff) and a potential issue with the heater circuit on an oxygen sensor (should not cause engine running issues unless the ECU programming is poor and can't deal with missing feedback sensor data). The MIL light had turned off on its own too as I pulled into the visitor lot which is why I let it idle as I ran the codes. I shut off the car, popped the hood, and wiggled all electrical connections on the top of the engine and at the coil-on-plugs. Started up, smooth running again. Made it home with no more hiccups. Is my "stall once 5 to 10 minutes after startup and then be normal" bug back? Or is this a different one thanks to the misfire #8 MIL code? Don't know yet... will have to watch over the next few days. I'm now wondering if Hyundai engine-compartment electrical connectors loose the metal spring stiffness that makes the female part tightly grip the male spade connector part leading to flaky electrical connections. Or perhaps I've got a poor "crimp" between a wire and its spade connection point?

When my car does die, it does not look/act like a total electrical failure. Just as before, the dash instruments continued to display, the nav and stereo system didn't miss a beat, etc. Just the engine conking out like an older car having the ignition coil get unplugged.

I saw some Hyundai workers moving a new Palisade and a sharp looking black sedan from the HQ area to some nearby site just before my car started going stupid. The woodworking store is HQ's neighbor.

mike c.

 

[mikec]

Well, whatever ails my Genesis 4.6 has gotten far worse. Today, while backing into the garage after a couple mile drive, it started running rough again but no MIL lamp. I left it idling intending to wiggle electrical connections to see if I could find one that would lessen the roughness. After a few seconds though it was obvious there was something MUCH more severe as my garage was filling with gas-smelling gray smoke. I.e. running excessively rich (too much fuel). I shut it down and gave up, tried to call the dealership. I'll have to have it towed there Monday.

When I shut it off this time, I noticed the electric fans kept running for a couple of minutes; I've never heard them run past shut-off. As an experiment, after waiting several minutes, I pressed the START button twice (not pressing the brake pedal) to wake up the engine/dash electrics. Several rapid click-click-click relays sounds from the engine compartment (hood was open so I could hear stuff) but otherwise things looked normal. I shut it off again, wondering if the car would fully shut off or would I end up with a dead battery too. After three hours I gave it one try at starting... the starter motor turned over for just a fraction of a second and then nothing. As if a cylinder is hydro-locked from fuel or something; it did not have the characteristics of a dying battery. That's it for this weekend... it's a garage derelict until a tow truck arrives Monday.

mike c.
2009 V8/Tech with about 80,500 miles.

 

[OUsig]

a few similar issues that I had before it all simply died during a normal highway drive. Was in the fuse box up by the firewall on the passenger side. Some of what you are stating sounds like a bad coil pack. At least one that is really close to going bad and could cause other issues. I would have them checked and if 1 is bad replace all 8...(easy fix but probably not cheap).
good luck and keep the thread updated please

 

[mikec]

update 9/3/2019: Dealer just called and is convinced the PCM is bad. List price is $2375 and they have no idea how long it will take to get one as none exist in the closest distribution center. Looking online it seems Tau compatible PCMs can be had - new - for about half that. We'll see; I mentioned that to the dealer. Anybody have links to Hyundai dealers or parts centers that deal in OEM new parts?

edit: they also claim the PCM is not part of the 10/100K powertrain warranty. Little of the engine electrical stuff is covered by long warranties it turns out.

mike c.

 

[mikec]

It's Oct 5th - finally got my car back - it took several weeks to locate a new engine computer. When I picked up the car this morning, the engine temp gauge indicated a warmed-up engine so the dealer must have let my car idle for a few minutes while they washed it. So I haven't been able to cold-start it to see if the intermittent stalling issue. (reminder: my car would die coming to a stop sign/light 3 to 5 minutes after stone-cold startup; once past 10 minutes or so it was reliable.) We'll see how it does over the next few days.

mike c.

 

[T13Genesis]

Yesterday, when I was turning on a residential road, my car shut off completely without warning. Engine, oil , and battery light were illuminated. I was able to turn the car back on and drive to work okay today. I do notice when I stop abruptly my car somewhat shudders as if it’s going to turn off. Please help.