2017 Hyundai Sonata Plug-In Hybrid Fuel system Problems

“On 3/15/2017 around 8am, I started my car to leave for work and the car showed a warning check hybrid system and the corresponding warning light came on. The gasoline engine also started right away and stayed on, even though the EV battery was full. The engine remained on throughout my commute to work and back to home in the evening. I plugged the car in my garage for charging overnight with the timer set to start the charging at 10pm. Around 10:45pm, my wife and I opened the internal garage door from inside the house and immediately smelled exhaust fumes and heard the engine running. …”

“While driving at a high rate of speed propulsion to the vehicle suddenly and without warning ceased, the electric and internal combustion engine were non-responsive (ICE stopped; hybrid motor didn't provide propulsion), the warning light said Check Hybrid System. Turn off engine I was put at risk because I was traveling at highway speed and was given no warning before the vehicle shut down. This has occurred nine times, I've reported all to Hyundai, they have had the car in the shop three times, the issue is not fixed. …”

“On August 31st 2021, While driving my 2017 Hyundai Sonata PHEV on interstate 95 the check engine and hybrid system warning lights came on and the car simultaneously lost power for 3-4 seconds, which caused a decrease in speed from 65 to approximately 50 mph. There was a tractor trailer behind me but thankfully it braked to avoid striking my car. The car regained partial power and I was able to drive it home. I took the car to the dealership to have it repaired. The dealer diagnosed a faulty battery management system, and replaced this component after 17 days. …”

“While driving car stuttered check engine light and check hybrid system flashed. Check engine lights stayed on until getting home. Next day. I scanned and code p0b68 was set.”

“Problem began Dec. 2021. Has occurred on 16 occasions since then. Warning light Check Hybrid System; Turn off Engine comes on while driving. The car then shuts off the engine and there is a 100% loss of motive power. Sometimes is associated with very rough braking with the car knocking'. On 3 occasions there has been partial/near complete loss of braking power. All incidents have occurred while under power, so far all while under 45 mph. No accidents yet. Two near collisions from the rear. Hyundai was notified of the problem Dec. 2021/Jan. 2022. …”