2012 Hyundai Sonata Hybrid Vehicle speed control Problems

“While on cruise control at 68mph I was going down a small hill & my car suddenly accelerated from 68mph to 82mph at which point I disengaged my cruise control & the car decelerated . I noted the mileage & took the car to Hyundai. They found no abnormal event in the computer log.this begs the issue that I did have this event occur. I had the compute microcode upgraded to the last rev earlier this year.”

“Yesterday the car drove fine untill about an hour before I went home. Then it started with the bumping/jerking when switching from electric to gas. Worse than it has ever been. Then the revving started, more than usual, and wouldn't accelerate. Then it was like the throttle stuck. Got the revving noice, but the eco wasn't burried at red, for about 1/4 mile before I was able to pull over into a parking lot. Shut off the car. Restarted and drove 1 mile to home. Revved a few times in that period.”

“While driving the car will randomly rev very high it started about 3 weeka ago while driving at around an average of 45mph in city. It was initially just revving 3-4 times until I hit the break and it was isolated to one incident per drive. But last night after driving on I-25 at highway speed I turned to a slower busy street more stop and go traffic and the car started revving again only this time it did not stop after one incident. As soon as I hit the accelerator it went into a revving fit. And didnt stop I couldn't even drive it because I could not get it to accelerate. …”

“When accelerating from a stop, the vehicle takes excessively long time to go from 0-25 MPH, so much so , that when merging into traffic it has unpredictable acceleration. At various times I would step on the gas pedal and sometimes it would have a 3-5 second delay before going forward. When it finally accelerates sometimes it has a popping sound and often the car lurches. I have brought it in 3 times for Hyundai to find the problem but each and every time they have said they were not able to find anything wrong with the car.”

“This vehicle has sudden unintended acceleration as well as continued acceleration after the foot is completely removed from the pedal. I have experienced several near accidents as a result of the problem while the vehicle was in motion. The dealer has been unable to fix the problem, which has been reported several times over the life of the vehicle and still has not been fixed.”