2021 Hyundai Elantra Hybrid Fuel system Problems

“I keep getting intermittent HEV warnings and 12-volt light. The engine then shuts down and I have no power. This has occurred several times while on the highway and this creates a safety hazard. I have been fortunate enough that this happened while I was close to the shoulder, otherwise, it could have been critical. …”

“the h e v warning light comes on when driving. the hybrid battery disconnects from the engine and the car is undriveable. have to pull over, stop the car, turn off the car and then reset the hybrid battery. this has happened twice in last week. thank fully i was able to pull over safely, but this a dangerous situation for me and other cars around me. the car had been taken to the dealership just two weeks ago and they were unable to diagnose the issue”

“Approximately once every 500 - 2000 miles (maybe more frequently this year), my car suddenly begins to accelerate hard. This happens even if my foot is completely off the gas pedal. Usually, before the problem becomes severe, there are a few minutes in which I suspect the car is sometimes lurching forward, or losing some ability to accelerate. Then the problem worsens til the car is almost undriveable... it speeds up, I slow it down with the brakes, I release the brakes, the car speeds up, I slow it down with the brakes again, and so on. …”

“When gas is pressed (even to floor) in drive, vehicle stalls, does not accelerate. Then vehicle jerks into propulsion after revving. Other instances, at deceleration the car will jerk and shake to a stop. I have mentioned the problem at every scheduled maintenance”