Did the dealer check for OBD codes? Sounds like a bad cam shaft position sensor.

 

They haven't done anything yet. I'm just worrying in advance.

 

What you are experiencing is a known issue. Be sure they replace both the intake and the exhaust can shaft sensors.

 

Thanks for the tip!

 

[...] I have a 2019 PHEV and love it, but while driving down the freeway, after a rest stop, this light came on along with a very startling alarm. It's happened before. I pull over, turn off the engine, and when I turn it on again, the warning is gone. However, this time, it kept happening. If I don't pull over, I start to lose power. [...]

What did the dealership say?

I'm interested because we had something very similar last Sunday (July 24) , with our 2019 PHEV! While the prelude was different, the rest of your story is oddly familiar. Prelude: we had had no prior warning or any "Check Engine" at all. The rest of the story: that Sunday, after a rest stop (just like in your case!), we got back on the highway in EV mode. The highway went uphill, so switched the car to HEV mode to save battery - but the "Check Engine" light came on, and then the "Turn off engine" message, and it started losing power. Forced to pull over next to a field, on the shoulder of a busy, major highway :-(

Called Hyundai Roadside Assistance (included for 5 years with the car). They were helpful, called a tow truck that came quickly, took the car and us to the nearest dealership. But the dealership was closed on Sundays, so the car had to stay there overnight until Monday. Dropped the key into the slot by the door, and took a taxi (also arranged by Hyundai Roadside As
sistance) to a hotel.

The next morning, the dealership service advisor said that they would not be able to look at the car until that afternoon, or even Tuesday. So we booked a taxi to our original destination (about a 1 hr. drive). But just before the taxi came to the hotel on Monday morning, the dealership called to say that they had managed to test it right away, and the car was actually OK. They had found 4 different service codes (see attached scan of the printout) and cleared them. So the "Check Engine" light was off now. They tested the engine and fuel pressure, and test-drove the car - all OK.

The technicial had written that this can happen if the fuel tank goes empty, and claimed that we had just refueled the car. The printout shows that comment, but I told the service advisor that this was wrong. We had filled the gas tank a few days before, and it was about 3/4 full. Weird that the technician did not see that.

Anyway, the service advisor told us that it's OK to drive the car, just watch to see if it happens again. So we cancelled the long taxi ride and had the driver just take us to the dealership to pick up the car. We made the 1 hr. drive to our original destination that day without any problems.

But on the way back, also after a rest stop (curiouser and curiouser!..) we got a "Check Engine" light again - fortunately, without the stark warning or any loss of power. Just in case, we made a detour to top up the battery to about 60%. We hoped that if needed, we can at least get off the highway on electric and get to a dealership. (ChargePoint Level 2 charger worked great.)

It's a long weekend in Ontario now, so our local dealership would not be open until Tuesday. Meanwhile, we're driving around normally, but the "Check Engine" light is still on. An unpleasant feeling.

I will post here when we have word from our local dealership.

Meanwhile, any ideas about handling these types of (possibly false) error codes would be most welcome. Thanks in advance!

[Alt. text for image accessibility:]

CUSTOMER STATES THE CHECK ENGINE LIGHT IS ON
- NO DIFFERENCE IN DRIVEABILITY PLEASE
CHECK AND REPORT

SCANNED VEHICLE FOR DTCS - FOUND 4 CODES P319000 ENGINE NOT READY /
P209600 POST CAT FUEL TRIM SYSTEM TOO LEAN/ P227000 02 SENSOR SIGNAL
STUCK LEAN BANK 1 SENSOR 2 / POAOF ENGINE FAILED TO START
INSPECTED CAT AND 02 INSPECT ENGINE - FOUND NO ISSUES BUT NOTED
GAS TANK WAS JUST FILLED -

[This is wrong! Gas tank was 3/4 full - see main text above. --Ioniquest]

IF FUEL LEVEL WAS LOW OR EMPTY THESE CODES
WILL THROW DUE TO VEHICLE BEING A HYBRID - DROVE VEHICLE AND
TEST
CONFIRMED OK

[End of alt. text.]

 

My current 38.3 kwh ioniq classic EV hasn't had a issue so far..But my previous ioniq hybrid had similar error codes even after only 1000 miles or so from new . Ended up needing replacement of the camshaft sensor twice which fixed issues for the next 2 years.. i then had a similar problem like you including loss of power ( struggled home on ev mode which is far more difficult on a hybrid as its motor is smaller but I was only 0.5 miles from home ) .. After a lot of investigation they felt that it was due to a faulty 12V battery and changing it sorted the problem..

The 12 V on the ioniqs ( and many hybrid / EV ).dont seem to last more than 2 to 3 years ..

 

Thanks for the info. Will ask dealer to check those items.

 

I had something similar happen just driving on the flat highway. I have a 2021 Ioniq PHEV. Battery SOC dipped way down, then could only got around 40 mph on the highway. After pulling off and calling Bluelink, SOC came back up some, but Hyundai advised me to get a tow and rental. Dealer just called and told me there is nothing wrong with the car. DTC of P319000 was active but dealer cleared it and can't recreate it.

 

I suspect that there is a fault which 'might' damage the system. Back end of 2021 I started getting the 'Turn off the engine, problem with the Hybrid system'. At that point, because of my low usage (COVID) and only used locally, I had last put any fuel in it 18 months earlier. Was advised to run it in Hybrid mode rather than Electric, switch from E10 back to E05 fuel and drive more!!. The system seemed to run alright, with the Malfunction Indicator Lamp light on. Occasionally, it would decide to through up a random collection of error codes.
Since then, I have only put about 10 litres / 2 gallons of fuel at a time, which would cover me for 1 or 2 months at a time, to ensure that my fuel was 'fresh' - thought that it was picking up water over time. As a problem, it would clear and then restart again later. Eventually, I managed to persuade my dealer, over the next 6 months, that there was a problem and they finally fixed it by replacing the sensor in the exhaust system.
Now, today, it is again showing the same error. Dealer cannot look at it for another 6 weeks, but I will see them tomorrow. Raised it as an issue with the online support team and waiting for a follow up from the AA, which will probably say that it is usable until the dealer gets to look at it.