Electrical System Problems of Hyundai Sonata - part 1

In 2023, my Hyundai sonota 2013 hybrid stopped on the freeway putting myself and others at risk. It told me to stop and pull over to a safe spot but everything locked up and I couldn't move it. I had to get a fuse replaced and it cost over $2k. 3 years later, my cars ebrake light has remained on for a few weeks, it will show a battery discharge warning upon starting up sometimes but now I can't even drive it as it displays "check brake and hybrid warning system" alerts appear on the dash display. I've already been terrified for years that this would happen again. This car is absolutely unsafe. It's still under 100k miles and has given me so many problems even though I have taken great care of it. I am taking it to the Hyundai dealership for another diagnostic. The fact that I see so many others online with similar issues leads me to believe that there should be more recalls on this car; moreover, I believe Hyundai purposely designs this models to break down regularly so we can take it to their dealership to be exonerated by their high prices for parts and labor. Hyundai is a con artist company. They do not design their automobiles with the safety of drivers in mind.

See all problems of the 2013 Hyundai Sonata 🔎.

A/c blower motor fan would stop working. Happened twice within less than a year apart. Upon further inspection, multi fuse wiring overheated and melted, ruining fuse and making a/c stop working during 100+ temperatures outside. Apparently this is a well known issue with this make and model Sonata. Electrical failure.

See all problems of the 2020 Hyundai Sonata 🔎.

Parking malfunction. Parked, running car moved itself to reverse and backed up a driveway crossing a dirt road and hitting a fence and post. This car could have hit and severely injured anyone who was in the path while it was reversing on its own. Car was in reverse and all parking sensors were blaring when the car was found minutes later.

I had taken my Sonata to mike miller hyndia in peoria,I'll and they agreed to do the recall although they had my vehicle for two weeks. They did not service it and when I picked it up they said I had to drive it till the service engine light come on. I was driving it five days later and heard a loud noise and car started malfunctioning I was stuck in a middle of a intersection and I had to push vehicle off road. I broke my right hand in this process and I have also lost my job I am very concerned why they did not service it after they agreed too and sent me off in it in that condition . . The car is currently parked and unsure what to do with it . .

See all problems of the 2011 Hyundai Sonata 🔎.

Blower motor malfunction at night. Smelled something burning. Extremely hot and humid outside. Windows fogged up inside which greatly reduced visibility. Checked the multifuse which controls the abs, oil pump, cooling fan, & blower. I discovered a burnt connection on one of the terminals for the blower. This is a huge safety and fire risk and needs to be addressed ASAP!!!! upon my research, I’m finding several Hyundai Sonata vehicles having this same exact issue. Kia vehicles are being recalled for this same exact issue. Why isn’t the Hyundai Sonata??.

The ac/heating blower motor circuit on my 2020 Hyundai Sonata failed intermittently due to extreme electrical resistance overheating and melting the terminal pins inside the engine fuse box. I took it to the dealership and they inspected it said it was out of warranty but it needed part number 18980-09910-fff and wiring kit 91300l1000-ff to repair at a cost of 780. 00 including parts, tax, and labor. This matches the severe design defect acknowledged in Hyundai TSB #25-ee-002h or alternative TSB-24-eeoo-1h. I filed case number 43138757 with Hyundai corporate. For now this just affects my air conditioning. However, the root failure is a known design defect that presents a severe vehicle fire hazard and potential loss of windshield defrosting capability, lights, etc. If the whole electrical system should fail. As you should know the engine bay fuse box (which currently has melted parts) is the "brain" for the car's electrical distribution. It doesn't just power my ac fan; it holds the fuses and relays for the cars fuel pump, engine control module (ecm), headlights, and electronic power steering. If left unfixed and over time as the plastic melts, copper wires will cross and touch each other, causing a massive short circuit. My engine could suddenly cut out and stall while I am traveling at 70 mph on the highway, instantly killing my power steering and power brakes and putting me in extreme danger. Again not to mention the fire hazard this situation is likely to cause. This should be addressed via a mandatory safety recall, so that I don’t have to pay for a known engineering design defect and in case the tbs bulletin fails or further unknown damage has already occurred.

On the freeway at night when headlights and back lights quit working. Got off freeway and were able to temporarily fix it. A few months later while parked in driveway and not in use for a couple of days, lights came on without our knowledge and drained our battery. Neighbor alerted us to the situation.

I am submitting a safety complaint regarding a recurring, unresolved electrical defect in my 2020 Hyundai Sonata sel. The vehicle fails to recognize when the ignition is switched off, leaving core vehicle systems active and causing severe parasitic battery drain that leaves the car immobilized. ?description of the problem: ?false "on" status: after parking, turning off the engine, and exiting the vehicle, the car continues to register as though the ignition is still active/on (accessories, cluster, or vehicle network remain awake). ? severe parasitic draw: because the vehicle fails to shut down its electrical circuits, the 12-volt battery repeatedly discharges overnight or while parked for short durations. ?battery replacement did not resolve issue: the 12-volt battery was replaced with a brand-new unit to eliminate typical wear, yet the drain and false "on" behavior persisted immediately. ? frequency: the vehicle frequently fails to start, requiring constant jump-starts or roadside assistance to operate. ?safety hazard: this defect creates a direct safety risk by repeatedly stranding the driver without warning in public locations, traffic stops, or remote areas. In addition, an electrical system that fails to enter a sleep state creates a potential hazard for component overheating, failure of electronic security and locking systems, or total electrical failure while attempting to restart or operate auxiliary safety equipment. Other Hyundai owners have reported identical issues where the body control modules or ignition logic fail to power down. ?corrective action requested: I request that the NHTSA investigate this electrical shutdown defect across the 2020 Hyundai Sonata model year to identify whether a faulty body control module (bcm), Smart key receiver, or ignition switch relay requires a safety recall and software or hardware remediation. Battery replaced on 09/04/2026 car inspected/diagnosed by Hyundai dealership on 09/03/2026.

The left blinker switch keeps going in and out, working about 50% of the time. Both the light and the blinker sound do not turn on. When getting it checked out at an auto repair shop, the maintenance tech said this was more and more common for 2021 Sonatas and it was not due to anything I did. It was a multifunction switch problem.

See all problems of the 2021 Hyundai Sonata 🔎.

Fuse for a/c was blown, caught on fire, and melted components.

See all problems of the 2022 Hyundai Sonata 🔎.

I was heading to work when suddenly smoke started pouring from the air conditioning vents, and the abs and traction control warning lights came on. I hit the brakes to pull over, only to realize I had lost braking power. I managed to steer to the side of the road as carefully as possible and bring the car to a stop—despite having no brakes and a fire burning under the hood. I tried downshifting to slow the vehicle, but the transmission didn't respond, and the cabin began filling with smoke. Once I stopped, there was nothing I could do to extinguish the fire, as the car was completely consumed within seconds. It was a fire in the engine bay; I lost the brakes, and the abs and traction control lights lit up. I assume it was a critical failure in the braking system, most likely involving the abs module.

Fan motor fuse box quit working and ac/heat no longer operational. First time was around October 21, 2025.

I am writing to report a direct violation of the theta ii class action settlement terms by Hyundai motor America. This morning , I emailed an executive case manager explicitly explaining that my 2017 Sonata has an active p1326 code, has the 2019 ksds update, and requires a mandatory diagnostic under NHTSA recall 17v226 that cannot be denied due to a salvage title. Instead of replying to my facts, the case manager kathy gave me a hard denial falsely framing my federal recall safety request as a "voluntary goodwill warranty" issue to justify her rejection. Please help me in getting authorization my car with Hyundai dealership in plano TX to run the bearing rod test and get it fixed.

See all problems of the 2017 Hyundai Sonata 🔎.

My vehicle while driving, it is jerking and shaking. When I come to a stop, the cars rpms go up and down while the car is shaking. When I pressed the gas pedal to accelerate the car will not accelerate as normal and the car jerks as I’m driving it. The rpms rev up and down without any pressure placed on the gas pedal. The check engine light came on. The miles per hour only allows me to put one digit. I wanted to clarify that the problem is occurring anywhere between 0 mph to 65 mph when these the car jerks and shakes and the rpms go up and down without me pressure on the gas pedal.

This vehicle had a recall, 201, for the Smart junction box. This was due to the blinkers not working properly. The software update was performed, however, the problem still exists. This was due to the Smart junction box. Now, aside from the blinker issue, the ac stays on when the engine is turned off, lights come on by themselves, the media screen goes randomly into night mode, daylight running lights are constantly in night mode, Smart junction box failure. I have not taken this to a mechanic as of yet, the dealership is aware, and I opened a case with Hyundai case #42940056, however, I have not received a call from my service advisor or Hyundai. They offered to do diagnostics, but, if these problems are not about the safety recall, I would have to pay $350 for diagnostics, unless I get the problem fixed by them. This car has 66k miles with a new engine installed at 59400 miles! at this point, I have the car parked, battery disconnected, and looking for the most efficient way to fix the problem, which must be performed by specialized equipment.

See all problems of the 2015 Hyundai Sonata 🔎.

I was driving my 2014 Hyundai Sonata that I only had for 3 months when it just quit on me. I pulled over and seen when white smoke was coming from the wires.

See all problems of the 2014 Hyundai Sonata 🔎.

Once again I am having to replace a bulb for my vehicle. This will be the second time in 3 months I have had to replace my rear blinker bulb. Not including the 4-5 times per year I have to replace headlight bulbs. This time the wiring has melted and the bulb has nearly melted the lens cover. I only buy the exact oem recommended bulb every time. Nothing fancy. Just the basic old school bulbs. Every year model around mine has been recalled for this exact issue.

No air coming from cabin, upon further inspection found melted multifuse with melting terminal pin area in fuse box. No prior signs of warning, leaving vehicle without operable air condition for high temperatures.

I was driving and all of a sudden the traction lights turned on and the sterring wheel is hard to turn. Almost go in a car accident. The windows just stopped working and the brakes light constantly keep getting burned out.

The vehicle is stalling in the acceleration process. I can feel and hear the stall by the air conditioner going out or fading out when it happens while driving. Pressing the gas and it barely moves at times. Makes a noise now while running. Unknown to whether it's electrical or engine or transmission. Pull out in the traffic accelerating but the car wasn't moving at the pace it should have. Could have cause an accident when trying to cross on going traffic. Just got the vehicle 2 weeks ago. No one has inspected the vehicle yet. Going to have it looked at for recalls. No warning lights appeared to reflect an issue, but there clearly is.

See all problems of the 2025 Hyundai Sonata 🔎.

The contact owns a 2022 Hyundai Sonata. The contact stated that while driving at an undisclosed speed, the hvac blower motor became inoperable with no warning light illuminated. The vehicle was taken to the dealer, where it was diagnosed that the blower motor fuse had melted and failed and needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 70,000.

1. ) following Hyundai's 9c2 campaign update for the ecu that was completed back on may 27th, 2026, my 2015 Sonata went into limp mode [solid check engine light present] while I was accelerating up an on-ramp on the 2nd drive cycle since the update was performed. I was already far away from the dealership so I was forced to limp it to my local shop that I regularly use to have it checked out. It was confirmed that the code on the vehicle was p200a for intake manifold runners. Since the update was for smog regulation, the code was cleared in order to see if it would come back. Since then, it has not, however the vehicle continues to have one persistent problem. The rpms will dramatically dip and then surge back upwards while the car is coasting (no gas and no brake applied). 70% of the time, you can feel the car violently jerk as it appears to try and correct itself. 2. ) I've brought this car to multiple dealerships, have a case open with corporate and have also found that this is a systemic issue with this specific update in these cars. All and all, nothing has been done. I'm repeatedly turned away over and over again because their techs are only permitted to look into it once they have hard evidence of a fault. In this case, that would be a dashboard light. I'm told that I may only return if the check engine light comes back, which as I mentioned previously, posed a huge safety risk to myself the first time it appeared. If I can only go 55mph down the highway, I am at risk of being rear-ended or struck in some way. 3. ) the problem has not been reproduced by the dealer as they will not test drive it to see the dip and spike. However, the code was still pending for awhile in the vehicle before it cleared it on its own, so that was acknowledged by at least one place. 4. ) vehicle has not been inspected by anyone but a dealership and local mechanic. 5. ) no other signs prior to the vehicle limping out on me other than some acceleration concerns on may 27th, 2026.

May 23rd, 2026, vehicle dash and navigation screens went black while driving on freeway. May 26th, 2026, vehicle battery completely drained. Purchased new battery and the same thing happened. Took the vehcile 3x to Hyundai dealership, switched out battery for a brand new oem one. June 10th, vehicle died again, battery was completely drained. Dealership said its not the alternator but only jumped the vehcile since they couldn't figure out the issue. July 11th, 2026, vehcile died for 4th time and had to jumped again. Tested battery by tow truck driver, battery was drained but alternator fine.

See all problems of the 2024 Hyundai Sonata 🔎.

Went from 65 and dropped down to 40 going up grades on the freeway. Started shaking, check engine light went on and electric battery disappeared from dash. Got to top of grade, went back to normal. Problem repeated on next grades. Car had just left dealership lot an hour prior where it was safety inspected and they said all was fine. Took back to dealership for inspection and they said that there were no codes showing for what happened and all was well with the vehicle, when obviously it was not.

See all problems of the 2016 Hyundai Sonata 🔎.

The cars fan is constantly running even when the car is cool. I think it has to do with the itms I contacted the dealer and they said there’s nothing they can do about it this happens every time the vehicle is started even when I am parked. The fan is constantly running at 100%.

We were backing up and leaving a parking space when the emergency braking system overrode our driving and forced a stop. This has happened many times, once while turning at a red light (which we had the right-of-way) and our car stopped on the middle of the intersection. Another time was during a turn in a non-traffic light turn lane where timing is important. Our car was again completely stopped in the middle of the road in oncoming traffic.

On my 2011 Hyundai Sonata GLS, both rear tail lights have melted to the point that the lightbulbs cannot be extracted and the brake and tail lights no longer work. When I looked into this, I found out this is a common issue on 2011 Hyundai Sonatas. It is almost always caused by excessive heat from the standard incandescent bulbs, which damages the wiring harness and deforms the plastic housing. When I called the closest Hyundai dealer (in chico, California), they told me the warranty had expired last year and that I should have received a notice about it after I obtained ownership of the car in March 2025 (a little over a year ago). However, I did not receive a notice about this. Since the tail lights do not work properly as a result of this problem, it is a safety issue as it could cause an accident. It should be a recall repair instead of a warranty that expires. My car is still well under the 200,000 mile limit that was set on the extended warranty, but they're refusing to honor that because of the warranty being expired.

Car just stated making g noise went into lp. Mode now saying k ock sensor.

I have a Hyundai Sonata 2017 one year after I bought the car I started having acceleration problems. I have had the throttle changed and the valve gasket cover repaired. On April 15, 2026 the check engine light came on. On April 29th I got theta 2 emissions update installed at Hyundai auburn, al. I took it too auto zone the same day the code p1326 was showing up and p0014. On may 5th my car entered limp mode for excessive oil leakage, I got an oil change April 6, 2026. My car has never done that until the update was installed. I get my oil changed every 6 months and also have sent them records. They denied my claim due to lack of maintenance.

This is a well-known and widely reported issue: 2013 Hyundai Sonata hybrid car, which has recently experienced the following dashboard alert: "hybrid system warning! safely stop and do not drive. " when the car is pulled over and shut down and sits for roughly 10 minutes, it starts up just fine and runs again for an undetermined amount of time, and then the alert will go off unexpectedly. This has happened twice, once the car was driven about 4 miles, and the alert came on, and the second time the alert came on as the car was started for the first time of the day. The car repair shop indicates that there are no codes saved when this happens. This is apparently a documented issue, where the codes are not saved, and difficult to diagnose by repair shops and dealers. It could lead to the vehicle completely shutting down while driving at highway speeds within traffic, which could cause a serious accident involving multiple vehicles and people. Why is this not recalled by the dealer and fixed? this has been reviewed by the dealer and by an independent repair shop. Is the NHTSA waiting for the death count to require the manufacturer to address the issue?.

I wanted to report the failure of my rear camera and/or the electrical circuit that is tied to it. It's my understanding that Hyundai has issued multiple recalls across different years/vehicles for issues in this area. My 2019 Sonata is not included in those current recalls. I was without my vehicle for a week and was charged over $1600 to repair. The issue was diagnosed and repaired by an independent mechanic. When they system failed numerous error lights/warning went off and continued to cycle thru (plus beeping). I wanted to report this in hopes of continued pressure on Hyundai to add this model/year to their recalls.

See all problems of the 2019 Hyundai Sonata 🔎.

On April 14, 2026, my 2019 Hyundai Sonata was parked at a retail store parking lot. Returning from the store, I attempted to start the car, and it did not start. I attempted to start it again, and I saw smoke coming out from under the hood. I immediately exited the vehicle and opened the hood. I saw open flames coming out of the engine area, about 4” high. I called 911 and waited about 10 minutes for the fire department to arrive. During this time, the flames engulfed the entire engine compartment and extended vertically above the hood height. The hood eventually melted and fell back onto the engine area. The fire department came and put out the fire. The car is totaled. There were no injuries, thank god!.

Supplemental information to existing NHTSA complaint involving a 2017 Hyundai Sonata plug-in hybrid (VIN: [xxx] ) while traveling at approximately 70 mph on a heavily traveled highway, the vehicle suddenly and completely lost propulsion without warning. The vehicle rapidly decelerated in traffic, creating a significant safety hazard for my family and surrounding motorists and requiring emergency maneuvering to reach the shoulder. The vehicle was towed to an authorized Hyundai dealership, where diagnostic testing identified multiple high-voltage battery system fault codes: • p0b68 • p0b6d • p0b72 the dealership diagnosed a high-voltage battery system failure requiring battery replacement. The vehicle is currently non-drivable. During my research, I found multiple owner reports involving Hyundai Sonata hybrid and plug-in hybrid vehicles experiencing loss of power, hybrid system failures, limp mode conditions, and propulsion-related incidents. I also learned that Hyundai previously issued recall 18v166000 involving 2016–2018 Sonata plug-in hybrid vehicles due to battery management system and voltage protection device concerns that could result in loss of power while driving. Dealer says does appply for my car. Although my vehicle’s fault codes may differ from those addressed in the recall, both involve battery-related failures capable of affecting propulsion and creating a highway safety risk. My concern extends beyond my individual vehicle. A high-voltage battery or battery management system failure that can cause a complete loss of propulsion at highway speed without warning presents a potentially serious safety risk. I respectfully request that NHTSA evaluate whether similar incidents involving Hyundai Sonata hybrid and plug-in hybrid vehicles indicate a broader safety concern warranting further review. I can provide dealership diagnostic reports, repair estimates, towing records, photos, and videos upon request. Thank you for your consideration, [xxx] information redacted pursuant to the freedom of informati.

The car will idle high around 1200 rpms. The car will most of the times fix the issue when you turn the car off and back on but it will start again after driving. This is a known issue with the car. I have had the egr valve replaced since it will pop up the codes p240f and p049 for egr slow response and control position exceeded learning limit but the problem came back within two days. I did find a forum that deals with the joint connector repair but this needs to be a recall as I have come across many people who have this problem and paying out of pocket to fix it.

Intermittent issue. On startup, the hvac system cycles through the modes and gets stuck blowing on mixed mode (face and feet) regardless of what mode is selected. The problem is temporarily fixed by manually tapping the mode button until the desired mode is selected.