general problems of the 2009 Hyundai Sonata

Passenger seat belt doesn’t click in. Miss fire poor acceleration exhaust leak power lost mechanic can’t find the problem check engine light on.

Once the car gets slowed down and reaches 20 mph of speed by applying the brake or not. It gives a sudden jerk, which causes immediate reduction in speed.

Stalls randomly and intermittently anytime and at any speed without warning. It happens while cruising on a freeway or stopped on a light.

Tl the contact owned a 2009 Hyundai Sonata. While driving approximately 10-15 mph and making a left turn, the vehicle independently accelerated to approximately 50-60 mph. The vehicle crashed into a telephone pole. The air bag deployed. The contact sustained two broken legs, a broken ankle, and several broken ribs, which required medical attention. A police report was filed. The contact was extracted from the vehicle using the jaws of life. The vehicle was destroyed and towed to an impound lot. The vehicle was not diagnosed. A dealer was not contacted. The manufacturer was notified and provided case number: 15535396. The approximate failure mileage was 81,000.

While driving the esc and check engine light comes then it will only let me �coast� about 5mph.

Upon accelerating up an entrance ramp to the highway, car accelerated at an unreasonable rate of speed tried using brakes, but they were gone. Car hit speeds of 60/65 mph for more than 3 miles on a turnpike. Parking brake did not work, brake pedal was down to the floor and I could not control the speed of the auto. After traveling more than 3 miles, in the shoulder, I put the gear into neutral and the car began to slow down and finally stop. Towed from turnpike to dealership. Know there have been problems with the 2006 model, but is there anything similar to my experience with the Sonata 2009.

The contact owns a 2009 Hyundai Sonata. While pulling into a fuel station, the vehicle accelerated independently. There were no warning indicators illuminated. The failure recurred twice. The vehicle was taken to an independent mechanic where it was not diagnosed or repaired. The manufacturer was not made aware of the failure. The VIN and failure mileage were unknown.

The contact owns a 2009 Hyundai Sonata. While parking, the vehicle accelerated in reverse. The contact attempted to apply the brakes, but the vehicle kept accelerating. The contact crashed into the vehicle in its rear. There were no injuries and a police report was filed. The vehicle was towed and was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was 62,000.

The esc light has been going off intermittently in my vehicle for the past 2 weeks, causing the shifter to downshift instead of keep moving the car when I press the gas, and the gas pedal becomes unresponsive. This happened on the interstate (I-78) today, and I almost got into an accident in the middle lane. I researched the problem, and it seems there was a recall on previous Hyundai models, yet Hyundai has failed to address this issue in the 2009 Sonata. There needs to be a recall regarding this issue. It is very dangerous, and could be related to the crankshaft sensor or a number of things, but bottom line, it causes the car to become unresponsive while in motion, and the driver needs to pull over, shut off the car, and turn it on again for it to maybe work, maybe not. This is a horrible headache that needs to be addressed, and I am sure that I am not the only Sonata owner with this issue. . Read more...

The contact owns a 2009 Hyundai Sonata. The contact stated that the shifter became stuck in park. The contact was able to shift into drive however, the vehicle then abnormally accelerated and caused the contact to crash into a wall. The contact did not sustain any injuries. The contact took the vehicle to a dealer to have repairs under NHTSA campaign I. D. 13v113000 (exterior lighting, service brakes, hydraulic) however, the dealer stated that the recall defect could have caused the vehicle to accelerate. The failure mileage was 65,000.

Esc off light comes on a few minutes after starting the vehicle. Resets after vehicle is shut off only to come back on a few minutes later. Additional sometimes cruise cannot be turned on and under no circumstances will engage with esc off light on.

Some times when starting the car with my foot on the brake the rpms go up to about 1200 and then down to 800 rpms. When my foot is removed from the brake the car wants to accelerate and go on its own often. While stoped at a stop sign or stoped with my foot on the brake the car will lurch forward when released, some times spinning the tires. It is progressively getting worse after returning from a 5000 mile trip in June, 2013. The car purchased new and has a automatic transmission with aprox. 65000 miles total on the car. This is a accident waiting to happen and should have a recall.

I was driving the Sonata when all of a sudden the car lost its force and wouldn't move. While stuck in the middle of the street I was pushing the gas peddle but the car would not go. The esc off light came on, and the check engine light as well. I powered the car off and turned it back on but the car still did not have a lot of force, but enough to get to a nearby parking lot. I left the car off in a parking lot for about 5 min and turned it back on. The esc light turned off, but not the check engine. There have been similar problems where its a switch in the brake peddle but that should not make the entire car shut off. I took it to my dealership since I just bought the car 2 weeks ago and now I'm waiting for diagnostics to come back.

The contact owns a 2009 Hyundai Sonata. The contact stated that while sitting at a traffic light with the brakes engaged, the vehicle lunged forward in acceleration. The contact stated that in order to stop the vehicle, she shifted into neutral and turned off the vehicle. Once the vehicle was restarted it resumed normal function. The vehicle was taken to the dealer however, the technician was unable to diagnose the failure. The manufacturer was not made aware of the failure. The vehicle was not repaired. The failure mileage was 33,000 and the current mileage was 33,200.

The contact owns a 2009 Hyundai Sonata. The contact stated that while driving at 35 mph, he attempted to brake but the vehicle continued to increase speed up to 50 mph. The contact mentioned that the engine revved, but did not brake. The contact stated that he stopped and put vehicle in neutral, then to drive gear. The failure occurred without warning. The vehicle was not taken to the dealer. The manufacturer was not made aware of the failure. The failure and current mileage was 21,956.

A few days after the ignition cylinder was replaced, the speedometer started malfunctioning. My wife drove the car to work. While the car was running, she noticed the speedometer needle was at zero reading while the car was doing at least 25 miles per hour. She turned around and drove an older car instead. Over the weekend, I drove the Hyundai Sonata around but the speedometer problem did not show up. But the following Monday afternoon, I experienced this speedometer problem first hand. I noticed the car would accelerate from stop with the needle either slightly going up or not at all. I was at least going 25 miles per hour on an expressway. The needle continued to be stuck at zero until I had to apply the brake, and then momentarily, the needle would bounce up between 20-30 mph before going back to zero again.

My 2009 Hyundai Sonata will speed up when I remove my foot off the gas pedal. It will increase the rpm's by 1000 which increases the speed of the car. This has happened many times now to the point of returning my car to the dealer for repair while under warranty. But, with 52,000 miles this should not be happening at all.

The contact owns a 2009 Hyundai Sonata. While the contact was driving approximately 35 mph entering onto a highway into the left lane, unexpectedly the vehicle increased acceleration and the brakes would not function when engaged. The brake pedal was applied repeatedly, followed by no power response. After placing the gear selector into the neutral position the vehicle began to reduce speed. The vehicle was driven into a parking lot and the gear was shifted into the park position and the vehicle came to a stop. The contact was waiting on the roadside assistance for the vehicle to be towed to an authorized dealer at the time of the complaint. The failure mileage was 17,300.

1. Driving from harrisburg to pottstown PA 2. Non-responding throttle at 60 mph. Pulled over to the shoulder, shut off and restarted the engine. Worked ok for a few miles; again, the throttle became unresponsive. 3. Found internal failure with throttle position sensor which was subsequently replaced.

The contact owns a 2009 Hyundai Sonata. While driving 25 mph, he slowed the vehicle down and began approaching a curb when the vehicle accelerated on it's own. The driver took his foot off of the brakes then he engaged the brakes again in order to drive onto the emergency lane. The contact experienced extreme difficulty while turning the steering wheel and attempted to stop the vehicle. The dealer stated that they were unable to duplicate or diagnose the failure. The contact does not feel safe driving the vehicle. The failure mileage was 400. The current mileage was 765 miles.

June 3, 2009 car accelerated on its own up to approx 65 mph when driver was pressing accelerator at 30 mph, and the car would not stop - driver stood on brakes, shifted to neutral, pulled up parking brake, got off road and turned off engine. Dealer made no repair-said their computer showed nothing wrong. August 12, 2009 car lost all power and engine lights came on - steered car off road. No repair made - dealer tightened gas cap- said computer showed nothing else wrong. August 17, 2009 car lost power again - steered off road. Dealer replaced the throttle assembly. June 24, 2010 car accelerated on its own up to 65 mph when driver pressed accelerator while going 40 mph, and the car would not stop - driver stood on brakes, shifted to neutral, pulled up parking brake, got off road and turned off engine. Driver called 911 and spoke to state highway patrol. Car was towed to dealer - no repair made, their computer showed nothing wrong. Dealer delivered car to my house, I have kept it off the road. Can't drive it, trade it, or sell it because it is dangerous.