2012 Hyundai Sonata: sudden unintended acceleration

Filed Oct 26, 2022 · Acceleration · NV

Approx july 2022 My sonata began to malfunction, first the steering wheel buttons stopped working intermittently off and on unable to turn on and set cruise control, unable to use hands free phone options as well as unable to navigate cluster features, as the time goes on the problem gets worse and eventually do not function ever. I replaced the steering wheel buttons which fixed the issue temporarily only now the vehicle will engage cruise control, accelerate dramatically and continue to gain speed. I am unable to disengage cruise control via the brake pedal, or cancel option or steering wheel. If I depress the brake pedal it will begin to decelerate but once I let off the brake pedal the engine will revv high and gain speed again. Buttons begin to function in a reverse order meaning press cancel, cruise turns on, press set button, cruise will set, press set button cruise will disengage etc. The only way to disengage cruise and rapid acceleration in this dangerous scenario is to Press the on off cruise control button. Immediately stopped vehicle had it towed to dealership, they stated that they could not replicate the problem, however their diagnosis for the problem was due to incorrect brake fluid put in the vehicle and suggested to completely replace the entire brake system of the vehicle I declined as I felt that was not the problem in fact bizarre diagnosis. Only hyundai dealership has ever put any brake fluid in my vehicle... this is completely dangerous as when vehicle suddenly accelerated I was unable to turn it off I almost rear ended a vehicle on the freeway going 70 mph. I no longer feel safe in the vehicle and it sits collecting dust while I make monthly payments.

Filed Mar 27, 2022 · Electrical, Engine · TX · fire

As I was driving on the highway, my car engine stalled and all the interior dashboard lights came on. I was unable to accelerate although all other features of my car worked (steering, brakes, radio, bluetooth, etc...). I was barely able to get off the highway safely as the highway I was on had no shoulder that was safely accessible. Luckily, I was in the far right lane already which allowed me to exit the highway. I was just barely able to exit the highway and move to the middle and far right lane of the service road before my car came to a complete stop. I attempted to turn my car off and back on without success. At this point, I could start to smell burning of something and knew I needed to exit the car immediately, however, I was unable to do so due to traffic on the driver side of my car. I noticed smoke coming from my engine which prompted to me to jump out of the car without continuing to pay attention to the traffic that was passing me. I called 911 to alert them of my car impeding traffic, potentially causing another wreck, and the potential that my car may be on fire. After making those statements to dispatch, flames shot forward from my hood and I was able to move away from my car. The fire department arrived on scene but not before the flames had reached 12+ feet as they were taller than the fire truck. The firefighters were able to put out the flames. My car engine was completely melted from the fire. At this point, the dealership, insurance agent or any other representative has determined a cause of the fire or has looked at my car. No warning lights to indicate a malfunction was visible prior to the incident. No noises or engine malfunctions were noted prior to the incident.

Filed Feb 1, 2017 · Acceleration · 25,656 miles · CA · crash

Tl* the contact owns a 2012 hyundai sonata. After the contact's foot was removed from the brake pedal, the vehicle experienced unintended acceleration that resulted in a front end collision. The air bags did not deploy. The vehicle was towed to the dealer. A police report was not filed and there were no injuries. The manufacturer was notified. The failure mileage was approximately 25,656.

Filed Mar 30, 2016 · Acceleration · 71,086 miles · MI

Car could not start without pressing acceleration pedal this morning (03/30/2016). After pressing acc pedal and turning the key engine started. It repeated the same way when car was started going to home. Although, it took much longer to start the engine. Drove home and then took kid to soccer practice. On traffic light, when green light was on, I was turning right but car suddenly accelerated without control. I moved gear to neutral and RPM piked to at 2500. I have a video of it after I stopped on red light. Car has 71086 miles and is in "prefect" condition. Check engine light was on for couple of days but there was no mil code present. After I turned the engine off and then on, check engine light went off and no codes were present, not even pending ones.

Filed Mar 7, 2016 · Acceleration, Transmission · 53,000 miles · MN · crash

Tl* the contact owns a 2012 hyundai sonata. While driving approximately 5 MPH, the vehicle accelerated when the brake pedal was depressed. As a result, the vehicle crashed into a pole. The vehicle was towed to the dealer, but the failure was unable to be duplicated or diagnosed. On a separate occasion, the failure recurred and the vehicle sideswiped a tree. There were no injuries in either crash nor were police reports filed. The unintended acceleration recurred sporadically. The manufacturer was notified of the failures. The approximate failure mileage was 53,000. Updated 04/29/16*lj

Filed Feb 23, 2016 · Acceleration · 53,000 miles · MN · crash

Tl* the contact owns a 2012 hyundai sonata. While driving at an unknown speed, the vehicle lunged forward without warning, continued to accelerate, and crashed into a power pole. There were no injuries and a police report was not filed. The vehicle was taken to the dealer. The technician was unable to diagnose the cause of the failure and stated that the vehicle was working up to specifications. The manufacturer was made aware of the failure. The vehicle was not repaired. The failure mileage was 53,000. Updated 04/13/16*lj updated consumer stated on 1/31/16 drove to church pulled into parking spot while braking slowly and stopping when cat lurched over curb and sped across church lot hitting 2 signs and electric pole before stopping- in sept 2015- it lunged and took it to dealer to have oil changed and had them ok the problem- dealer said nothing was on wrong. On 10/15 when parking car lunged again and hit a tree- consumer did nothing, consumer fixed the car herself because dealer would not admit there was a problem. Updated 06/05/18

Filed Jan 14, 2016 · Acceleration · DC · crash

Email letter from consumer to the administrator re hyundai's flouting of their agreement with the federal safety agency by refusing to honor the sonata recall for sudden unintended acceleration. *smd the consumer had placed the vehicle into park, with her foot firmly on the brake, when suddenly the vehicle violently lurched forward at significant speed and hit and broke a split-rail fence and post.

Filed Jan 4, 2016 · Acceleration · 42,800 miles · IN

Tl* the contact owns a 2012 hyundai sonata. The contact stated that while idled, the accelerator pedal was depressed but the vehicle hesitated to accelerate. In addition, the vehicle lunged forward and the contact was able to avoid a collision. The vehicle was taken to a dealer where it was diagnosed that an ecu upgrade needed to be performed. The vehicle was repaired. The manufacturer was not made aware of the failure. The failure mileage was 42,800.

Filed Oct 19, 2015 · Engine · CA

Tl* the contact owns a 2012 hyundai sonata. While driving at an unknown speed, the vehicle stalled without warning. The vehicle was taken to the dealer who replaced the fuel pump, but the failure persisted. Upon refueling the vehicle, it surged forward. The contact later received a notification for the federal safety agency campaign number: 15v568000 (engine), but was unable to receive the part from the dealer within a reasonable time frame. The manufacturer was notified of the failure. The failure mileage was not available.

Filed Feb 5, 2014 · Acceleration, Brakes · 26,993 miles · KY

Unintended acceleration, had to slam on brakes and put car into neutral in order to prevent shooting into a intersection of oncoming traffic. The car immediately threw a number of codes, and a engine control system condition code, check engine code.... Dealer tells me when unloaded off the tow-truck that the brake pedal went to the floor, after 6 days of having the car the dealership service manager is telling me no problem could be found due to not being able to reproduce the problem.

Filed Jan 22, 2014 · Acceleration · 35,000 miles · NY · crash

I had just pulled into a small rural parking lot and parked facing a wood fence in the afternoon. I had my foot on the brake and put the car into park. The car suddenly lurched forward about ten feet, knocking over a wood fence post and incurring $3,000 damage to the car. I still had my foot on the brake, and slammed it instantly as the car lurched. Fortunately, no person was walking along the sidewalk, and I had my seat belt in place. I insisted the car be towed to the nearest hyundai dealer rather than to a local repair shop, since I wanted to find the cause of this acceleration malfunction. The dealer said they found nothing wrong, other than the front end damage. I insisted that hyundai national send out an engineer to check the car. I have also found a report on the internet from kmov.com news in st. Louis 2/28/13, that three local owners there experienced sudden unintended acceleration. The case detailed in the news report was exactly like my experience of sudden lurching acceleration from a parked position, but the hyundai engineer reported nothing was wrong. However, our experience documents an unintended acceleration problem unrelated to driver error. I have told hyundai that I will absolutely not continue to drive this car.

Filed Feb 26, 2013 · Acceleration · 18,000 miles · MO

Tl* the contact owns a 2012 hyundai sonata. The contact stated that while at a complete stop, the vehicle suddenly accelerated. The contact mentioned that in order to maintain control of the vehicle, he engaged the brakes and shifted into neutral. The vehicle was taken to the dealer. The technician was unable to diagnose the failure. The manufacturer was made aware of the failure and stated that they would contact him at a later date. The vehicle was not repaired. The failure and current mileage was 18,000. N updated 4/24/13 *cn the consumer stated the failure could not be duplicated. The consumer traded the vehicle in. The manufacturer requested the vehicle be held for further inspection. The vehicle would, intermittently, not shift into second gear. The air condition malfunctioned. Updated 06/05/2013