2012 Hyundai Sonata Hybrid: sudden loss of power

Filed Aug 13, 2021 · Acceleration, Engine · KY

The contact owns a 2012 Hyundai Sonata Hybrid. The contact stated while driving 50 mph, the vehicle loss power and decelerated to 25 mph. The check engine warning light was illuminated. The vehicle was taken to the local dealer, but the vehicle was not diagnosed or repaired. The manufacturer was notified and the contact was referred to the local dealer for assistance. The failure mileage was unknown.

Filed Jul 14, 2019 · Driver assistance, Electrical · 165,000 miles · CA

While driving the car on the freeway, it will jerk forward and then shortly after lose power. The car shows the battery as being barely charged. I pull over (luckily haven't been killed yet) on the side of the freeway. Let the car sit for a few minutes, restart it and the battery is half full and the car is driveable. I've read online that this is a common issue with 2012 hyundai sonata hybrids. I've taken my car to a hyundai dealership twice, and they can't find anything wrong, diagnostics show its fine. The second time I took it in they replaced the battery located in my trunk for $485. That did nothing, as the car is still randomly shutting off, and most times in the most dangerous areas of the road. I don't think hyundai will do anything about this until numerous people are killed. Forgot to mention that sometimes when it shuts down the check oil light comes on. I've had the oil replaced and the oil sensor, so thats not the issue.

Filed Apr 2, 2019 · Engine · 93,000 miles · TX · fire

Engine fire, non collision. Just driving down the highway. No warning lights came on until engine quit running. Lost power and engine became extremely hot. Had to tow to mechanic who said engine might have caught fire and I would need new engine.

Filed Dec 8, 2018 · Transmission · 120,000 miles · SC

This has been happening on a daily basis for at least the last 4 months, some days are worse than others. Seems like the trans computer cannot make up its mind to engage or disengage and create a 'power loss' or acceleration loss. The car then bucks and clunks for a few seconds until it figures out what its going to do. Happens in low engine temps, car has not reached 1/2 way temp for several months, always runs 1, 2, or 3 bars from cold, replaced thermostat, radiator fan stopped working and replaced that. Sometimes the car will over rev and then catch making the car lurch forward or backward. This happens usually at stop signs or stop lights, but the RPM have been buried at high while driving then drops rapidly.

Filed Oct 9, 2018 · Electrical, Steering · 111,600 miles · AL

First incident, sunday, september 9, 2018. While driving, car suddenly flashed warning lights, with message pertaining to the battery. Car decelerated extremely rapidly and became harder to steer. Pulled car over out of street as it lost power. It stopped. Lights remained on. Turned car off and then turned it back on. It cranked up and could be driven as if the incident never happened. There were no warning lights or warning message when the car was restarted. Second incident, monday, september 10, 2018. While driving the car to the dealership for diagnosis of the problem, the car suddenly lost power again, the warning lights flashed again, and again it became hard to steer. This time driver was not able to pull the car over; it stopped in the street. Driver turned the car off, then turned it back on and drove to the nearest service station. A tow truck was called and the vehicle was towed to the dealership. The dealership stated the vehicle did not register any code that they could detect. They had a technician drive it from work to home each day and the vehicle never gave any problem. They could not find any problem at all with the vehicle that required service or repair. Vehicle was picked up on saturday, september 16, 2018. The dealership waived the diagnostic fee since they were not able to diagnosis a problem. The vehicle has been traded-in. The issue was reported to hyundai motor corporation.

Filed Jul 29, 2016 · Electrical, Transmission · 62,000 miles · CA

Tl* the contact owns a 2012 hyundai sonata hybrid. While driving 45 MPH, the vehicle lost power and came to a complete halt. In addition, the accelerator pedal was depressed but the vehicle failed to accelerate. "hybrid battery low, shift to park position" was displayed across the message board. The failure recurred on numerous occasions. The vehicle was towed to a dealer, but was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was 62,000.