Electrical System Problems of Hyundai Sonata - part 2

I was sold a 2024 Hyundai Sonata sel and while driving on the road multiple times the car completely shut off. By this all lights inside and outside the car turned off (headlights, interior lights and all) car was still rolling and I pulled over each time as all systems rebooted. It claimed that all seatbelts were off with the warning sign. Had to unbuckle and buckle all seatbelts for this warning to go away. Since the car completely shut off this put other drivers, my passengers, and myself at danger due to visibility. Luckily there was no traffic at the time but this keeps happening and it is worrying me.

See all problems of the 2024 Hyundai Sonata 🔎.

The vehicle experienced an engine and power train failure while driving on the highway, resulting in sudden loss of power. The electrical system also failed after the dealer visit, causing the battery to die every morning. Yes, the vehicle is available for inspection upon request. My car suddenly lost power on the highway and would not accelerate, forcing me to pull over on the shoulder with traffic moving around me. This created a serious risk of a rear-end collision or crash. Additionally, after the dealer visit, the electrical system began failing and the vehicle has been completely dead every morning, leaving me stranded with a child and unable to reliably start the car. The problem has not been reproduced because the check engine code cleared itself after the incident; however, the symptoms absolutely remain. The dealer refused to diagnose the loss-of-power event because the code was cleared, and they returned the vehicle to me with a dead battery. The electrical issue (car dying every morning) has been happening consistently since the dealer visit. The vehicle was taken to a Hyundai dealership immediately after the incident, but they refused to diagnose the loss of power due to the code being cleared. A mobile mechanic scanned the code at my home before the tow, but the code disappeared afterward. The electrical failure began after the dealer visit and has not been properly inspected by Hyundai. Yes. While driving on the highway, the check engine light came on and the car immediately lost power and would not accelerate. After the dealer visit, the car has been completely dead every morning and requires a jump to start. These symptoms began on the same day as the highway incident and continued after Hyundai serviced the vehicle.

See all problems of the 2016 Hyundai Sonata 🔎.

We think there’s an issue with the abs module and wheel speed sensor because we started having a problem where the brakes wouldn’t work or would stutter. The car would shake real bad it would make an awful grinding sound but normally only when trying to stop at higher speeds or long braking. The only thing that made it stop was to unplug the abs but then other parts of the car stopped working like the speedometer and the sensors around the car. So we got the abs replaced but the new one started doing the same thing. We did some research and it sounds like the same issue Hyundai is having with the palisade. The incident that made us get it replaced to begin with was were driving down the road and we got to a traffic light but when we tried to brake they just didn’t work so we drove through the red light luckily the one person who was supposed to be going saw us and didn’t pull out in front of us so we didn’t get hit. We haven’t taken it to the dealership yet but my sister who teaches automotive repair at the community college is the one who diagnosed it so she said we should report it here so maybe it won’t happen to anyone else. Before we had the brake issue we were having problems with basically everything on the dash not working randomly. We’d be driving down the road and the speedometer and the outside sensors and the gas gauge and the traction control all would go out at the same time it’s the same stuff that went out when we had the abs unplugged so it seems that might be related.

See all problems of the 2018 Hyundai Sonata 🔎.

The vehicle experiences a recurring defect where the brake light turns on suddenly and the engine shuts off while driving. The failure appears related to the braking system (brake switch circuit), electrical system (can-bus/ecu communication), and engine control (shutdown/stall). The system remains installed and is available for inspection upon request. The shutdown poses a serious safety risk, including possible rear-end collision or loss of power in traffic. The problem has occurred multiple times. The dealership inspected the vehicle briefly but failed to diagnose or document the defect and returned the vehicle within hours, stating “it shouldn’t be a problem,” even though the issue continues. Hyundai has refused to provide recall documentation or authorize a re-inspection. The only warnings prior to shutoff are the sudden activation of the brake warning light just before the engine cuts off.

See all problems of the 2011 Hyundai Sonata 🔎.

While stopping at a major highway intersection on [xxx] for a red light vehicle stalls and will not start back up while everyone else continues at a 55 mph mile an hour passing me on each side! this happened more than 6 times . While you’re stuck in intersection,you have to keep trying to start the car eventually it will start . Apparently it is egr valve and is a very common problem. It is noted in the common problem for this year making model and the repair cost is in the range of $1600 even the dealership said it is a very common problem. They have been experiencing it. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2020 Hyundai Sonata 🔎.

Rear view camera stopped working about 6 weeks ago. Mechanic says need new camera which would cost about $500 labor and parts. Contacted dealer and Hyundai corporate to report and complain. Many other Hyundai vehicles have same problem with rear view camera but they are included in a recall campaign. Mine is not. Mechanic said the repair requires new camera and wireing harness. Hyundai case number is 41861577.

See all problems of the 2013 Hyundai Sonata 🔎.

Based on what I experienced, the fire appears to have resulted from an internal mechanical or electrical failure that occurred without warning while the vehicle was in motion. No prior issues or dashboard alerts were present at the time, and there was no external impact or damage that could explain the fire.

See all problems of the 2012 Hyundai Sonata 🔎.

Vehicle stalled while driving.

Unknown. 2018 Hyundai Sonata engine has failed. Only purchased the vehicle in December 2024, and the engine is defective. There is much information, via research, indicating that Hyundai is aware of the engine issues with this year vehicle, but are unwilling to make amends. Vehicle has 100,189 miles.

Came off the highway to a stop sign went turn and the engine just seized and would not start no matter what I did. Had to have it towed to my house. Safety risk was just off the road so I did not get hit. Police stop and told me to get a tow truck. And no warning signs at all.

The rubber stopper for the brake light switch on the brake pedal deteriorated and fell apart. This resulted in the brake lights remaining on constantly, cruise control being disabled, and low battery voltage.

See all problems of the 2015 Hyundai Sonata 🔎.

We pulled up at hillgreen circle cockysville MD to drop my boyfriend off at his apartment. I went to pull in the parking spot. I went to put the car into park and it had no brakes. I was slamming them and pumping them. It excellerated and took off. Jumped the curb,went down the hill and into the apartment building. A red light had came on the dash, right before it took off. Seemed like it was changing to gas or the electric mode,or the other way around. The airbag on the passenger side came out deflated,and filled with smoke going into the car. He was the belted front passenger and his elbow went in to the front window. You can tell by looking at it,the hole and spidered around it. He broke his right elbow. It is available anytime at the moment. It's at Hyundaii in glen burnie. I need to get it to state farms lot,to get the kelly blue book value. We look forward to hearing from you.

The contact owns a 2013 Hyundai Sonata. The contact stated that while driving at approximately 75 mph with three passengers inside the vehicle, the vehicle stalled. There were no warning lights illuminated or messages displayed prior to the failure and the vehicle shutting off. The vehicle could not able to be restarted. The vehicle was coasted off the exit to safety and then towed to the residence. The contact’s neighbor and son inspected the battery but found no fault with the vehicle. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was 135,000.

Car sits several days at a time. Door locked. 12 volt auxiliary battery goes dead within 60 minutes after driving 60 miles. Happened 6 times in last 6 weeks. Battery is lithium. Dealer looked at car sept 8. They did cursory check and said my rodent deterrent caused issue. After driving 60 miles. Turned rodent deterrent off. Still have issue. Car resets the 12 volt battery nearly daily. Lithium battery if bad can blow up and cause vehicle fire. Car is parked in car port next to house. If fire, it burns up my house also. This is fire hazard. If the battery is bad, it must be fixed. Car under 10 year 100,000 mile bumper to bumper warranty. I need car fixed. Not just looked at. This is fire hazard till it is fixed,.

See all problems of the 2021 Hyundai Sonata 🔎.

I have tried to have my Sonata 2013 gone over gor the previous ownership never gave me any ro in this bias was stared. This previous wherebpurchased and worked , was not on the the up and up. Vwhere ,steele Hyundaibwhen owned know keating group purchased. I'm asking ngo iver the safety I the setvice ussues t hat Hyundai is awarevand have all thr campsign numbers looked up I do not believe since ive oened the car ,sonata anythingbwas donen,agein nothing evervstated and knly oil changes done without any given paper wirk given on recalls except oil changes. Ssues and . So wanting, asking that no chargeb,go iver make sure for the situation posted and Hyundai posts in 6bareas yes , go over for the brake system is causing the hybird tobshit down and the car with squiggly line know comes on fuses and the the brake power booster sensor is the problem gor I had the Sonatanon computer that came up also shavings in the engine campaign 162,994 251 to go iver no charge to make sure it was done and whatever faulty be replaced no charge . Charge to Hyundai for the problems if safety and service are on line stating should be taken care if no charge to consumer. Nothing is happening, just the insanity definition, to resolve. I ask forba new case manager I'm entitled to, can't turn down ,but is and lies about contact. Once, returned call no return call. Hope in the next 24 hours this be resolved so I can have this situation at no charge,don't believe ever done,no paper work in my possession, never had oil changes. Never told ,never anything from Hyundai. Almost got reat ended will send bill any to Hyundai tontalje carebofbas well something know NHTSA isn't helping after many complaints as this. Hyundai admits no charge for t his situation ,insanity and no cooperation just arrogance and belligerence . Mileage has nothing to do with. Engine should be looked at for whatnot NHTSA rant about engine in my Sonata hybird and engine,problem still exists at.

This has been going on nothing resolved and no cooperation. Im going yo locate an attorney that really don't want to. Requesting this be ,the situation be loojedvatb,at no chargevand replace whatbwasvsuppisedly replaced by steele south loop Hyundai ,houston texas ,sold to keating groupbbased out if texas. What I'm asking isn't make sure itvwas done ,and whatever replaced ,inexpensive to do to. Repkace the parts , and computerbprograned to make current no chsrgebto ne for Hyundaibsta t ES in line and would not be getting emails from NHTSA as I do . Hope finally 24 hours resolve, cooperation and done finally.

Pushed acceleration at traffic light to cross and turn into neighborhood, car started beeping frantically, 'check hev system' flashed on dash as well as 'turn off engine' while car decelerated to 1-3 mph. Battery meter bar on left side of dash completely depleted showing no battery power supply at all. Turned vehicle off for a few minutes then restarted. Put the vehicle in drive gear and same warnings appear, car doesn't even accelerate when gas pedal is pressed fully, stays at 1-3 mph crawl. Vehicle stalls out after 30 seconds, vehicle turns on but cannot start.

Oil leak on alternator engine leaking oil from the front cylinder bank’s valve cover or from the valve cover’s gasket onto the alternator. An unknown amount of oil damaged the alternator resulting in illumination of the charging system warning lamp and disablement of the charging system. If the vehicle is continually driven with a disabled charging system, the engine can shut off, increasing the risk of a crash.

See all problems of the 2009 Hyundai Sonata 🔎.

Driver side window switch that controls all the windows intermittently fails to operate at times which causes the window to not open or not close back again randomly. When wanting to close any window from the drivers seat the switches don’t work causing a safety hazard in a situation where the windows would require to be rolled up or opened immediately. Issue not brought up with Hyundai or any dealer because warranty doesn’t apply to 2nd owner. No warning lamps or errors. First incident happened August 2025 and has kept on happening intermittently.

2021 Hyundai Sonata with approximately 39,000 miles. On 8/21/2025, the dashboard displayed the following message "shifter system malfunction! service immediately" when the warning appeared, the vehicle shifter button would not function, creating a traffic safety risk. History: dealer service history shows the transmission was replaced on the vehicle under warranty on 08/30/2021 with 2,212 miles with no campaign/recall issued. Dealer states there is no recall campaign on this vehicles specific VIN # and NHTSA currently shows no open recalls for this vehicle. However, Hyundai advertises an 8-speed dct safety recall for the same year, make and model, and describes this identical issue, but has left this vehicle's VIN# out of scope for this recall, which is continuing to demonstrate the same issues. Current dealer/manufacturer response: on 9/4/2025, the dealer declined warranty or recall repair unless the fault was active on their diagnostic scan at the moment the scan was performed. A photo was provided to the mechanics of the dashboard showing the transmission service warning, with current mileage. The dealer advised there were no diagnostic log history showing the transmission error code even with photographic proof and attempted to return the vehicle to me. I have rejected the return of the vehicle and advised that this needs to be escalated, because if logs are not appearing, this is even a bigger cause for concern and that the vehicle is a safety hazard. Concern: because this vehicle required an early transmission replacement and is now exhibiting new transmission/shifter warnings, I am concerned the failure relates to the known transmission/shifter recall on this model and that the recall scope and/or remedy is incomplete for the affected vehicles including my VIN #. It is also possible the dealership is attempting to run out the warranty which expires in 3 months. Vehicle, photo of the warning, and service records are available for inspection.

Vehicle will not start. This is the fourth incident where vehicle will not start. It has had the software update, battery and voltage regulator replaced in the summer of 2025. In Aug of 2025, vehicle will not start with jump or use of 12v battery in vehicle.

See all problems of the 2022 Hyundai Sonata 🔎.

Wiring for headlights, and break lights has been malfunctioning. It is not a fuse and I have tried changing them to the point I keep extra in my trunk and still won't work. Yes, available for inspection, I have been pulled over multiple times and was written a citation yesterday.

Car turned off at light all lights work and turns on engine won’t roll over the battery and alternator and starter are all good.

I am driving and all of a sudden the brakevsystem lighthouse on bthe hybird system begins to fail and ge car loses power I almost got hit 4 times already, from this . The system starts to ding ,shut down and states to bring to a certified mechanic ir dealership. Hyundai has on line tgeybarevaware and this problem for this model and should be taken care if no charge for bis a problem for this year model and hybird model 3 diff we rent areas on lounge through Hyundai it states this a known issue. The part to replace and had a certified ase mechanic on computer look and went through the computer system and stated it is a power booster brake sensor. This is starednin 3 different areas bon Hyundai websitebfornthe model and year. Suppised the recall in the nowhere done oct 8 2024 but never had any letter of recall nor the dealership contact me anmboutbthis ,but had an oil change done at or about the supposed nrevapl been done. I have no documentation of this nor any given so inwantb,asking give me type kit needed, to take care nofbthis. . No documentation ofbanybkjnd given exceptb,no invoice given done, so I would like tge kit for fuses do go bad. Anything can be put in computer stating what is supposed done but not. Im not asking except to rake carebof this no charge for Hyundai it's free in 3 different areas should be done non published recall . For this year. All online. I asked for cooperation in this matterband the dealership that purchased has been sold to anormther and banner dealership stated in line ,not responsible for previous dealerships problems etc,take it up warmth them the steele group out if canada,that sold to ge jeating group that know owns this dealership . . I asked for a newbcasemmanager ,drniedband I have a rightbtocaskband should be changed for her arrogance, belligerence in nmattrr should not be. I purchasednthe brake booster sensorbforbwhat fred bactyally a little less with labor, beingshipped from Hyundai . Dot.

My Hyundai consumes oil and I have to put oil in it every two weeks! also my ignition coils has had to be changed 4 times. Also check engine light just came on code saying catalytic converter or oxygen sensor changed oxygen sensor a couple months ago. I purchased it brand new and as soon as I got over 100,000 miles nothing has been going good since then please help also my paint on the top of the car is starting to peel. Will never buy a Hyundai again.

See all problems of the 2017 Hyundai Sonata 🔎.

Without warning, symptoms of the a/c blower not working first occurred a little over a month ago. The fan just stopped blowing altogether (no cold or hot air). After turning the car and the a/c system on and off several times, it began working again and that was it. This past week, the same issue occurred intermittently over 3-4 days. The a/c blower did not come on for a day, the next morning it was functioning, that evening it stopped blowing again, and this went on for several days. Research of the symptoms via youtube and many online forums, and most importantly confirmation through visual inspection of the fuse box, confirmed that the blower fuse is burning so bad it has melted the connecting port in the fuse box. Whatever the electrical malfunction, the fuse burning and melting is disrupting the connection and ultimately the a/c blower itself. In the dead of such a hot and humid summer, it has been insufferable having to ride around with such inconsistent and intermittent air conditioning.

The electrical in the entire car is malfunctioning. Sometimes the brake lights don’t work due to wiring, other times the seats control don’t work and the cables to battery is not connected/firing correctly. Has an entire electrical issue.

See all problems of the 2014 Hyundai Sonata 🔎.

This is on my 2021 Hyundai Sonata hybrid limited - for the 7th time the vehicle has been completely dead and unresponsive. I have had to gain entry to the vehicle using the manual key and press the "jump" button to get the vehicle to start. The Hyundai dealership ran a bunch of battery updates to the 12 volt battery several weeks ago and said that should hopefully fix the issue. Several weeks later on 07/19/2025 the vehicle was dead again. I had to use the key to manually gain entry and jump the car again. The dealership said that the 12 volt battery may need to be replaced and said that it is fully integrated with the hybrid battery system which is covered for 10 years/100k miles whichever comes first. I am still within the warranty period so hopefully Hyundai will fix the issue. From an online search, it appears this is not an uncommon issue with the Hyundai Sonata hybrid. I am waiting on Hyundai for a fix and for .

We were sitting in our car at a hardees drive through when we noticed smoke coming out from under the hood. I pulled forward to a parking space and opened the hood. Flames shot up at least 6 feet. I quickly ran a short distance into the fast food place and right near the door was a fire extinguisher, which I grabbed and put the fire out with. The fire burned for about a total of 2-3 minutes, and did not do excessive damage. Coil packs and wiring harness got most of the damage. With the hood closed, you cannot even tell there was a fire. I had the car towed to grayson Hyundai for the recall part, but then entered a claim to Hyundai. Long story short, they stalled me for over a month and then denied the claim. Citing no damage to the cam. Unlike most of the fires with this carline, my car fire was put out very quickly. The recalled fuel line/tube was not damaged much at all. You could inspect the part and see the wear on it and tell it was the culprit. It didn't take a trained mechanic to see this. After I put the fire out and it cooled, I tried starting it, and there was fuel squirting out from the recalled part. There is absolutely no doubt that the recalled part was the cause of the fire. But Hyundai has given me a denial letter that does not state the reason for denial. The Hyundai rep on the phone told me it had to do with no damage to the cam. I then asked, thats because I got the fire out so fast right? and he said no, didn't have anything to do with it. But he lied. First of all, the cam has nothing to do with the cause of the fire. A damaged cam only happens when the fire was long lasting and severe. They should have inspected the obvious recalled part right in front of them. This denial is completely unprofessional and hints of a concerted effort to categorically deny claims. They don't usually have this much evidence, they did this time and still blew it. Had I let it burn to the ground,=approved.

I have contacted the guy that sold me the car he refused to fix the recall which is my motor I need something done , Hyundai won’t honor their recall .

Purchased 2019 after 44,000 miles engine was replaced metal in engine and inverter coolant issue July 2025 117,000 my inverter coolant light came in and off several times then car through all warning lights hev check engine warning shut it down went into limp mode towed to dealership they checked and cleared codes said it threw 13 codes but after clearing they stated nothing wrong with it as they went to pull car around it happened again this time code was knock sensor which they relaxed at no charge extended warranty they next day after picking up while at idle hev warning went in shut car off and it was gone kept driving nonissues the next day again it happened and this time the engine light stayed on spoke with dealership they said they would charge me diagnosis charge of 208 and if it was related to what they did. It would be covered also stated if the engine light was flashing it would be covered or it isn’t the engine isn’t covered the inverter coolant is not bubbling or moving when car is on it is an inverter coolant issue that was a problem back when my first engine was repaired and should be covered I love my vehicle but I have had so many issues since getting it major things and the lighting system showing a black spot in my view as well that could not be fixed I will attach pictures of earning lights and video of coolant not circulating and the dealership filled the coolant way over the top I have to now take it back again to have it looked at.

See all problems of the 2019 Hyundai Sonata 🔎.

I started the car, put it into gear and then the breaks wouldn’t work. The car dash said something like check breaks hybrid system failure do not drive. There is not recall on my car but the Hyundai service department doesn’t know how to fix it. This is the second time it’s happened. I’m scared to drive it. Please investigate!.

Steering wheel warning light comes on traction control light comes on. Steering becomes difficult.

I drive a 2012 Hyundai Sonata limited. After a recent fill-up, I began experiencing delayed acceleration, engine hesitation, and what appears to be misfiring—especially at low throttle. Most notably, the brake lights stay illuminated even when the car is turned off, which drains the battery and poses a major safety hazard. I scanned the vehicle with an obd-ii scanner and received code p0504, which points to a brake light switch malfunction. I also noticed that pressing the start button with my foot off the brake still starts the engine instead of going into accessory mode—confirming abnormal brake signal behavior. I replaced the brake light switch, which temporarily fixed the issue, but the symptoms returned within a day. After researching, I found there was a recall (NHTSA 15v759000) for a nearly identical issue involving the brake light switch and stopper pad. However, my VIN is not listed, even though I am experiencing the same safety-critical symptoms. This issue poses a significant safety risk on the road, and I believe my vehicle should be included in the affected population of the recall or issued a technical service bulletin extension.

Initially vehicle battery is drained after three days of sitting in driveway and not being used. Vehicle has been taken in to dealership in July 2025 and found the 12v integrated battery was faulty and was replaced after being on backorder for three weeks. After battery was replaced the vehicle battery is drained after five days of sitting in driveway and not being used. No lights are left on, no aftermarket accessories are plugged in or attached to the electrical system. This has been an ongoing issue and the dealership I initially worked with has now had my car 3 different times and over four weeks and have stopped returning my phone calls. I have just sent my car do a different dealership and have been told it may take up to 2 months to diagnose the issue. I cannot open the door or start the car without using the emergency key, when I gain access to the car the 12v battery reset button rarely works to power the vehicle again. This is something that the dealerships are aware of, but have no idea what the actual problem is. Please for the love of god help.