general problems of the 2015 Hyundai Sonata - part 2

My hydraulic brake booster went out, very dangerous I almost had an accident, the car doesn’t stop, there are no brakes the car would not stop I’f the hydraulic brake booster goes out you have no brakes and if you’re over 50 miles an hour the e break barely does anything it just sounds like you grinding into the ground. Very scary and I had a child in the car. Towed car to Hyundai.

Hybrid car with various hybrid system failures that results in sudden loss of power while driving. This has occurred 3 times to me while on the highway (I-75 in south FL). Car suddenly loses power, could not accelerate but I was able to get off the highway safety. This has been reproduced at the dealer and they first replaced the hybrid generator then the hybrid battery and ecm and now it occurred again yesterday while I had 2 children with me and now they blame the transmission. This is a dangerous car that should be recalled and investigated for the true cause of sudden and unpredictable power loss.

Hybrid system warning comes up often and everytime I take it to get assessed, something different is getting fixed. These repairs are all expensive out of pocket repairs. The problems continues to happen and I’m constantly repairing something different.

Trying to break after being hit to prevent hitting another driver . Ended up hitting the driver still and my car ended up catching on fire .

Vehicle displayed hybrid warning while moving through an intersection on a highway. The car's engine turned off along with the power steering and brakes. Had the light not been in my favor, I would have been unable to stop on a high speed highway with oncoming traffic.

While driving, received hybrid system warning that shut the car down . Power steering and braking were non-existent so safely stopping and pulling over was near impossible.

I took the car for 4 recalls it had 2 of which were physical and the other two were software according to them. Took the car back to drop someone off, turned it off and then on; it began losing and breaking on its own at slow rpm’s slamming on the breaks. A minute later after having turned the corner I turned on my hazards and it had continued to randomly happen to the car. It is not consistent it is completely random and I have had a mechanic only inspect it while it happened once because I’ve only been able to have it happen while being inspected out of luck . I’ve gotten several error codes to the car since from p04 misfires. Evap leaks etc. The car was in pitch perfect condition and after that day it has since stopped working properly . I have photos of the mechanics that day even leaving food in the back of my car as if they just relaxed and didn’t do their job as professional as it could’ve have been . They denied anything is wrong with the car and have offered me discounted inspections after claiming nothing was wrong they gave me one free inspection and I haven’t gone back . My engine or censors are messed up. It puts my health and others at safety because it slams on the breaks unknowingly and randomly at low rpms. The manufacturer has inspected my car and claimed it was okay although they unprofessionally left food and ate breakfast and left trash in the back. (with photo proof) . Last there was no issues whatsoever with my car until that day. Never had a misfire . Never had a engine light . Never had a popped tire . It all began they day I got my car back not even an hour later. I could not return that day because it was near closing time of the dealership and the day after I went they denied it has been tampered. This happened around the beginning of July 1-8th 2023.

The contact's friend owned a 2015 Hyundai Sonata. The contact stated that while her friend was driving at 20 mph, another motorist motioned for her to roll her window down and informed that her vehicle had caught fire underneath the hood. As her friend opened the driver side door, the vehicle became engulfed on flames. The contact's friend was taken to the hospital where she sustained severe burns to the left side of her body. The contact's friend had her skin grafted from the right side of her body to repair the severe burns sustained to her left thigh and ankle as well as other parts on her body. A police and fire report were filed. The vehicle was completely incinerated due to the failure. The remains of the vehicle was towed to an independent tow yard where it was deemed a total loss. According to the fire report, the fire was caused by an unknown electrical failure malfunction; the source of the failure was undetermined. The dealer nor the manufacturer had yet to be notified of the failure. The vehicle was destroyed. The failure mileage was 71,820.

My 2015 Hyundai Sonata has recently been having both electrical and engine problems. Roughly a month ago, I had my vehicle completely stall in the middle of the highway. I lost power and a bunch of lights came on at once. Thankfully, I was in the right lane so I was able to safely get off the road even though I had many other cars speeding around me. I had no acceleration, I was just cruising off the highway at this point. Thankfully, my brakes did still work. Engine light and a bunch of errors turned on but went away once I pulled off and restarted the vehicle. I pulled off the road and once I decided to try and start it and go again, my car felt like it had hardly any power the whole way home. Fast forward to last weekend, I was driving home and my car would not accelerate. The engine light comes on and this time, my acceleration didn’t completely shut off, I was just very limited. I had to ease into the gas because I felt like it was having a hard time shifting gears and keeping up with the rpms. I felt uncomfortable pushing it above 50. As I got close to home, I noticed a knocking noise in the engine. I plugged one of my code readers in and it spit out 7e8, 7e9 and I believe it was p1326. Super rough start and feels like it’s going to break down if I try to drive it. I’ve left it parked since.

City driving and the bells and warning message on the dash stated the electrical system was being evaluated for causes why the engine/electric drive failed.

2015 hybrid Sonata, milages at 82,000 km, owned for 8 years. "hybrid system warning, do not drive" message occurred, car lost 100% of its power, went into complete stop without any warnings on the middle of the highway. Hazard lights do not work and unable to warn incoming traffic that the car has completely stalled in the highway. The car is unsafe to drive. Went to Hyundai (here in canada) several times, being charged every time for diagnostic and repair works, been told that the issues were fixed via software update. Problem persists. There are compelling evidences from different car forums, websites and NHTSA own database (28 reports under unknown, 22 reports under electrical sys. Categories. . . ) on the hybrid system failure or/and 100% power lost lead to complete stalled car. Although all these reports did not site any injury, major or death events, NHTSA should compel Hyundai to take appropriate actions to render the car safe to drive for the public because if accidents should happened, it cannot be undone and will affect lives of people. The public relies on a governing body to represent us and hold the manufacturer responsable to ensure that their mkt released products are safe: to save lives, prevent injuries, reduce vehicle-related crashes.

The car has had multiple issues with the hybrid system. I’ve taken it to the dealership about 4-5 times. They “fix” the issue but a little while later I’m having more hybrid warming issues. This last time I took it to a different dealership, paid for a diagnostic test, and was told my hybrid system was bad but because it was repaired too many times instead of replacing it, it’s no longer covered under warranty. The issue from the last diagnostic test showed the master brake cylinder was faulty, I replaced it but I’m still having the same issue. The mechanic I took it to did their own diagnostic test and it showed there is an issue with the hydraulic booster, high pressure accumulator short term charge. When I searched the issue, I’ve found that many people are having the same issue with the same car/year as mine. I contacted the manufacturer and they are still not willing to fix it even though it is a possible defect in the car.

The contact owns a 2015 Hyundai Sonata. The contact stated they were taking their vehicle in for a routine oil change when the dealer convinced them to have a promotion completed on their vehicle that included the engine flush. The next day while driving at approximately 10 mph, in stop-and-go traffic that had come to an idle, the vehicle suddenly decelerated and stalled at a fast rate. Smoke began to be emitted from underneath the vehicle's hood. The dashboard had been illuminated with various warnings such as battery failure, check engine, low engine, and several others unable to recall. The contact immediately coasted to the side of the road and exited the vehicle. The vehicle had eventually engulfed in flames causing the police department to begin putting out the fire. The fire department eventually arrived and put out the fire. The vehicle had been towed but not officially deemed totaled due to still undergoing determination. The contact stated they provided a police report however was unsure of the police department and of any police report numbers. The contact learned that the VIN was included in NHTSA campaign number: 21v749000 ( exterior lighting, electrical system) after the incident occurred, but had never had the remedy completed. The dealer that the contact made car payments was informed of the failure but the dealer to repair the vehicle had not seen, diagnosed or repaired the vehicle. The manufacturer was not made aware of the failure. The failure mileage was unknown.

The car has had an electrical issue ever since taking to to get a recall around may of 2023. It will randomly brake and shift the transmission badly while downshifting. I feel as if my make and model falls under the theta ii campaign they had to replace certain engines for having a knocking rod be fault and release shaving into the engine causing it to misfire. Not only that but the electrical issue is completely random it happens atleast once or twice a week. It had began ever since I took it for a recall, and when I took it back they found no issue and left food in the back of my car and the chairs leaned back. This was the fontana Hyundai dealership.

The contact owns a 2015 Hyundai Sonata. The contact stated while driving 60 mph, the vehicle stalled without warning. The contact coasted the vehicle off to the shoulder of the highway and the vehicle was towed to an independent mechanic. The contact then discovered that the vehicle was included in NHTSA campaign number: 21v749000 (exterior lighting, electrical system) which the mechanic linked to the failure. The vehicle was then towed to a dealer where she was informed that the part was on backorder. The manufacturer was notified of the failure. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The vehicle was not repaired. The failure mileage was approximately 100,000. Parts distribution disconnect.

After taking my 2015 Sonata eco to the dealership for campaign 993; campaign 210; and, campaign tww 15-17 I have experienced the following issues: right turn signal stopped working alarm goes off 5 minutes after locking the vehicle dash indicates my rear driver side door is ajar when it is locked prior to having the service done my vehicle did not have any of this issues. Rusnak Hyundai inland empire has not been helpful in resolving these issues. I am being asked to pay to diagnose the issues that were not present prior to the software updates.

My car was stolen 1week after the recall was performed that was supposed to immobilized the engine. The recall did nothing and now I'm left with the aftermath.

“hybrid system alert” comes up on the dash and the system shuts down, all electrical is lost including hazard lights and the ability to put the car into neutral. Since the car shuts down Hyundai says they cannot retrieve the code to solve it. It has been happening on and off for over a year and I’ve been stranded on a dark road with no lights on the car and no ability to push it off the road. Hyundai is not helping! they need to recall these cars as the issue is widespread. The car restarts after a day or so, but in that moment it is not driveable and very unsafe. It’s clearly a flaw, as there’s no code to be found. It needs to be recalled and fixed. Aaa has towed me or come out several times and cannot understand the problem.

The contact owns a 2015 Hyundai Sonata. The contact stated while her son was driving the vehicle at approximately 65 mph, the steering wheel became difficult to steer. The contact stated that the driver pulled to the side of the road. The contact stated after the driver turned off and restarted the vehicle several times, the steering wheel responded as needed. The contact stated that the message "power steering fault" was displayed. The vehicle was taken to an independent mechanic, where it was diagnosed and determined that the loss of power steering assist was related to NHTSA campaign number: 14v325000(steering, electrical system). The contact was referred to the dealer for assistance. The contact stated that the failure recurred intermittently. The vehicle was taken to the dealer, where it was diagnosed that the electric power steering assist motor and unknown related parts needed to be replaced. The contact related the failure to NHTSA campaign number: 14v325000(steering, electrical system); however, the dealer informed the contact that the VIN was not included. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 65,000.

A aknocking noise from the engine that increases in frequency as the engine rpm increases. A reduced power and/or hesitation and vibration. A illumination of the "check engine" light in the instrument cluster.

Engine keeps losing power not sure why & also abs brake system out of nowhere when accelerating in freeway they automatically brake sometimes for safety feature.

Rear passenger door will not lock manually or via manufacturer installed causing issues with child safety lock and at high speeds can be opened causing injuries and or death ,windscreen on panoramic sunroof detaches causing safety hazard.

The motor locked and the car turned of completely.

After driving for 15 or more minutes, the power steering fails. The warning light for the power steering and stability control turn on at that moment, as well. This failure occurs while driving and the wheel jerks a bit if the car is in a turn. There was a power steering recall for other Hyundais of the same era, which is very coincidental.

This is the third time this has happened. The car just starts to beep and stops working wherever it is. Its died on the highway and another busy road during rush hour causing a dangerous backup in which the police needed to be called. The car just beeps and flashes on the dash "hybrid system warning! safety stop and do not drive". Also, "check charging system". The car just stops and basically dies on the road when this light comes. When this happens the steering wheel does not really work and the gas/breaks have limited function. This could cause a major accident on a major highway or even off of a highway. I am quite surprised that there has not been a recall for this serious safety concern.

Alternator tensioner bracket broke, causing the alternator to hang loosely, which caused the car to gradually lose electrical power to all accessories and safety equipment due to the serpentine belt being loose from the broken bracket. During traveling immediately before failure, the battery warning light illuminated on the dash panel, going on and off intermittently. Thereafter, I began losing control of all my electrical safety features, including power steering, blind spot detection, lane departure warning, forward collision warning system, and eventually power to my entire vehicle as the battery was drained of all charge. At the time of events, my family of 4, including a 2 year old and a 10 week old, were all occupants of the vehicle. With the power of the vehicle declining, the power steering was activating/deactivating intermittently causing the car to jerk one way or the other unexpectedly. Had we remained traveling on the highway at highway speeds, our safety would have been greatly compromised from the unexpected power failure to all electrical safety features. The vehicle and fractured tensioner bracket have not been inspected or confirmed by dealer or independent service provider as the vehicle is not drivable. The broken tensioner bracket is apparent and indisputable.

The power steering started malfunctioning and then caused all warning lights on the dash to illuminate including check engine, power steering, abs, and after coming to a stop and waiting several minutes the lights went off but power steering was still not operating correctly.

The contact owns a 2015 Hyundai Sonata. The contact stated that the tpms warning light illuminated. The contact then stated that the steering wheel became difficult to maneuver. The contact stated that she had to use the shift release button to shift gear. The contact then stated that all the lights on the instrument panel failed to illuminate. Additionally, the contact stated that the vehicle was taken to the dealer where it was diagnosed that the hub sensor needed to be replaced. The vehicle was repaired however, the failure recurred. The vehicle was not diagnosed or repaired. The contact referenced NHTSA campaign number: 14v325000 (steering, electrical system). The manufacturer was notified of the failure and the contact was informed that her vehicle was not included in the recall. The failure mileage was approximately 129,000.

While I was driving, my check engine light came on. It wasn’t flashing so I was going to continue driving to a parts house (because the dealerships around me were closed) and have them check the codes that were present. Immediately after I had that thought, I noticed the car was smoking and the battery light and the traction control light had come on, so I proceeded to pull over and shut the vehicle off. I got out and noticed the hood had soot on the edges. I called 911 and watched the car go up I’m flames. This all happened in less than a mile. I noticed a fluid of some sort had sprayed out of my vehicle onto the road and the underneath the vehicle was coated in the fluid. This is still being investigated but I know of a lot of Hyundai/kia vehicles have caught on fire while driving. I’m not 100% sure of the cause yet, but I want to document that this did happen to my vehicle. I would love to update as soon as we figure out what has caused the car to catch fire while I was driving.

This is yet another incident of a Sonata hybrid hybrid flashing a warning to the driver and the the engine shutting down. This time it was Sep 7, 2022 in morristown, TN. . Read more...

My battery,oil and check engine light came on. The car would not start, took it to the dealer they had my car 3 weeks and they said they couldn’t pull any codes because it started up. However, they did charge the battery. I drove the car a few day and the same thing happened where the same codes came on and car wouldn’t start. I had to find a ride to work and when I got home and started the car it started right up. I have also read plenty of reviews claiming this same things has happened to them.

When auto lights are engaged and the blinkers are engaged, the light will turn off and it will blink in the wrong direction for a few times and then blink the correct direction. While in auto lights and you turn a curve they will sometimes go off. Now I have an issue with my ac - it goes on and off randomly. Had it looked at and they cannot find an issue with the components but said it could be an electrical issue. Byw, Hyundai replaced the motor in this car as well because it had so many issues. I was told the issues now could be caused from them replacing the motor and causing an electrical issue. The paint is also peeling and they had a recall on the paint, but the paint on my car didn't start peeling until after their warranty had expired. This is a known issue with 2015 models - they know the paint is bad but won't fix it. Car manufacturers should be held accountable for what they put on the market, or at least fix what are known issues for multiple vehicles.

The issue is with the hybrid system, which malfunctioned and apparently ruined the rest of the car. The damaged components are adding up to over 75% of the car's value. The vehicle slowed and stopped suddenly on a busy road when the issue started. Currently, it has been inspected by two different shops and they have both given me the same diagnosis.

After taking my car in multiple times to be serviced for a "hybrid system warning" mid last year, they were unable to read any error codes or diagnose any issue. I took it to two separate dealerships with no luck fixing the issue. I then completely broke down due to the same "hybrid system warning" on the highway on 7/26/22 heading to pigeon forge, TN with two children in the car. I had to have my car towed to the closest Hyundai dealership in knoxville. They were unable to diagnose and fix my car within the timeframe I was in town. Since Hyundai would not provide me with a loaner, I had to get a rental car to get home that I was not reimbursed for. We ended up paying out of pocket to replace the safety plug/fuse and the power relay assembly on 8/9/22. After having the car back for three months, the warning popped up again on 10/18/22 just as it did earlier that same year. I immediately called to schedule a service appointment with Hyundai and had to wait almost four months to get a service appointment here in cincinnati. The appointment was on 1/26/23 and they have yet to "replicate the issue" so they are unable to diagnose the car. I am supposed to pick up the car this week even though it's a safety hazard. I have had two cases open with Hyundai customer affairs but since they cannot diagnose the car, there is nothing they can do. They have been absolutely no help at all.

My abs lights came on and then minutes later my check engine light kept blinking while my car kept stalling or not let me accelerate in the middle of traffic. It’s like the engine dies but the car is on. It only stalls for a second then accelerates then stalls again and accelerates. Almost caused an accident. Seems that this is a problem for a lot of these models. It’s just crazy how it all happened back to back. My car has been running fine otherwise till that happened.