I’ve been seeing this is an issue with Elantra’s. I have a 17 Elantra SE, & the battery, engine & oil light comes on & the engine cuts off. It happens every other day..I replaced the oil, air filter & cleaned the spark plugs, used injector cleaner but it’s still happening. I took my car to O’Rilleys & Autozone to run codes & both the battery & alternator are working perfectly fine. I’m really thinking about trading the car in for something else.


has anyone ever successfully found out why this is happening?

 

I would not be too hasty, because , it could be a simple problem.
Just because an engine stops running ,really shouldn't be cause for a trade in unless you really just want another vehicle.

I can come up with 2 possible reasons for this. Either the the fuel supply has stopped or the ignition system has stopped.working.
Any good shop should be able to provide an answer as to which, fairly easily. The problem comes when now you need to find out exactly why.
If you just want another vehicle and can afford it , by all means do so. If you like the vehicle and want to keep it , someone is going to have to check it out.
What do you think?

 

This just happened to me I have the same car, 2017 Hyundai Elantra. Were you ever able to find out what the problem was?

 

A lot of us are waiting here for the folks that either received the answer they wanted or maybe not. They either forget to get back and reply or, just don't care.
We have to live with that.
Hopefully some of them will have the courtesy to return the favor.

 

Is this a common thing? Also have a 2017 Elantra SE, just rolled over 100k with no issues.

Coil on plug so that eliminates a lot of possibilities. Fuel filter is maintenance free and no periodic replacement but can be inspected. I'd look at stuff like worn lock cylinder (is there a ton of crap / keys / other weight on your keychain?) or burnt/loose electrical connection.

Another thing is you can monitor more closely when it happens - things like engine temp, humidity, outside temp, etc., may be factors. Better yet, get an inexpensive Bluetooth OBDII reader and an app that reads live data and has data logging, and you can record on your phone exactly what is happening in your engine.

All I can tell about this issue from this (year old) thread is, "sometimes it stalls, happens every other day, and doesn't seem to be battery or alternator"

 

I agree with some of the logic presented. What we need to verify is , if the ign sw is shutting off, the lites on the dash should also shut off. but that doesn't seem to be happening.

What I would suggest is;
Connect as suggested a scan tool and observe if fuel pressure is lost.
It should also be able to tell us if ign power is lost. With that info we have someplace to go and start checking. Until we do that we have no idea what is happening and why.

Finding the cause is not too difficult, having the equipment to do the checking is what can get complicated.. Also If the live data was available , all you would need to do is post it here and we should be able to offer suggestions on where to verify certain conditions are either present or not. Including ,,,, incorrect pieces of info which can be just as troublesome as no info to the system.

 

I had something similar all three lights would come on and my car would die when I came to a stop and sometimes while I was driving my rpms would drop to 0. It was my camshaft position sensor. One little wire caused all that. The engine gets really hot and it over heats the wire once the car is warmed up. Good luck.

 

So my Aunts car had this same problem. Changed starter because it tested bad even though car started fine every time, changed fuel pump and then reused original (pump purchased online was defective and caused evaporative codes), changed oil pressure sensor. Finally replaced oil filter with OEM filter and that fixed it. The oil pressure sensor on these cars are very selective and require using only OEM oil filters.