fairly significant
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
11,965 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2015 Hyundai Sonata fuel system problems

fuel system problem

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2015 Hyundai Sonata Owner Comments

problem #11

Dec 192016


  • 16,500 miles


My vehicle has a little over 16K miles on it and has stalled 4 times. Once after waiting at a light in the city, once while driving approx 10 mph in a parking lot and the worst while trying to climb a steep hill in a rural area as I was leaving home. The car slowly rolled down the hill, I was able to maneuver backwards around the curves but there was no power. I almost got hit by other cars several times due to the blind curves. The car remains on but will not accelerate and it sounds like the engine has stopped. After it stalls, I turn the car off and it will not restart. The last time it turned back on after at least 30 minutes. Have had to have it towed twice. The first time the dealer said it was a loose grounding wire to the fuel pump. The second time they said they could not replicate the problem but replaced the fuel pump. The car is not safe to drive, next time it stalls I might not be so lucky. Researching online there are several other possible causes which I plan on discussing with the dealer. There is no warning before it stalls so I cannot risk taking my children or anyone else in the vehicle.

- San Antonio, TX, USA

problem #10

Feb 022016


  • 10,000 miles
My 2015 Hyundai Sonata limited sport 2.0 is getting 10 mpg less than the window sticker states even though I only use eco mode, synthetic oil, and premium fuel.

- San Diego, CA, USA

problem #9

Nov 272016


  • 13,500 miles
Shortly after exiting interstate and slowdown for signal, I attempted to accelerate and the vehicle was totally unresponsive, like I wasn't even giving it gas. I have had it serviced twice and towed once for stalling while driving, shuddering, sputtering. Took waiting and numerous attempts to get it restarted. The second time, the dealer kept it for a week in October and could not find anything. (this is my second complaint as I want all this documented). Doesn't mean it doesn't exist. They replaced the fuel pump. I just drove it back from out of town this weekend (300 miles) and I noticed the acceleration was quite sluggish especially when trying to accelerate to pass. It was like the passing gear would not engage. Afraid my car would just stall again, I did not pursue heavy acceleration or passing gear attempts any further. Then this happened today. I feel there is something definitely wrong with this vehicle, and that every time I drive it, I am at some kind of risk. Saw some other complaints about ECM. The problem needs to be identified and corrected; this is definitely a safety issue, especially at high speeds or heavy traffic. There is definitely something wrong here.

- Houston, TX, USA

problem #8

Jun 102016


  • 8,340 miles


1st event June 10 2016 - car stopped on the fwy at speed over 65 mph. Stepped on the gas pedal and was no power. Attempt to restart and car run rough. Car towed to dealer (tuttle click-Hyundai -irvine, ca.) 2nd event July 18 2016 - driving on fwy at speeds over 65 mph, gas pedal starts vibrating, driving become rough, clicking noise from engine when idling. File complain with dealer, dealer say it did not find anything, blame the situation to costco gas, and it says that the car requires to use different type of gas (such: Chevron, shell).

- Santa Ana, CA, USA

problem #7

Apr 032016


  • 15,000 miles
Driving at 75mph on I-77 northbound near charlotte, (lake norman) when suddenly the engine died. Traffic was heavy but thankfully I was able to coast to a narrow shoulder. Cars were coming within 2 feet of my car so my wife and I exited the vehicle and ran up an embankment to get out of harms way. Police and a tow truck arrived and took the car to lake norman Hyundai where a faulty fuel pump was diagnosed. The repair took two days since the part had to be ordered. The incident was harrowing and could have been tragic for both of us. The car was a little over one year old with just over 15,000 miles. Hyundai motors has been contacted but I get nowhere with the company. I am now concerned about the possibility of this recurring to my vehicle or someone else.

- Hilton, NY, USA

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problem #6

Apr 082016


  • 44,000 miles
I purchased a used 2015 Hyundai Sonata with 43K miles. I have had it for three months with minor problems such as sluggish acceleration, hard deceleration when removing foot from gas pedal, and a noisy engine. However, on 4-8-2016 at about 7:30 am, I was attempting a left turn on a busy metropolitan street when the 2015 Hyundai Sonata shut down suddenly, completely turned off! all the warning lights on the dash lit up like a christmas tree and then went dead. The 2015 Sonata came to a stop, and there was a truck approaching at a high speed rate that had to swerve around me to prevent a collision with me. I was lucky the driver was paying attention. This problem is very dangerous and it is just a matter of time before someone is killed due to this problem, which seems to be occurring in many 2015 Hyundai Sonata vehicles. I believe Hyundai must know about this and Hyundai probably knows what is causing this safety issue with the 2015 Sonata. Hyundai or NHTSA need to recall the 2015 Hyundai Sonata vehicles asap!! if nothing else tell the owners what the problem is so that they can repair it on their own dime!

- Gardena, CA, USA

problem #5

Nov 022015


  • 9,000 miles


On 3 separate occassons the vehicle was on a major street when it just died.the first time was comng out of a stop at a red light, the second just when I was driving and the third time whle I was deaccelarating. Miraculalously I was able to use the last bit of momentum and pull over. The car started up again each tme. The dealer had no suggestions the first 2 times except for possble computer misfire.they released the car staitng it should be fine and they could not replcate the event.after starting a case with Hyundai they decided to replace the ignition coils and then the fuel pump. After much questioningand little cooperaion from Hyundai or the dealer, I was told that 1500 people reprted the same life threatenening event onn thier car. Not enough for a recall!!!someone is going to get killed. Neither the dealer or Hyundai thinks this is an issue.case number 8479377.I have never received a call from the case engineer from Hyundai explaining any repairs as promised. Hyundai is unresponsive. The service manager is mike dsantis md isalnd Hyundai centeeach NY631 580 0800

- Kings Park, NY, USA

problem #4

May 102015


  • 2,150 miles
Went to pass a tractor. Notice the car was not down shifting. Pushed harder on the pedal and heard a click. After that the car down shifted (I believe this click maybe normal as I notice it on other cars but other mfgs did not have such a violent sounding click. ) the issues is that the pedal got stuck down and I had to use my foot to manually release the pedal from fully down (I reached speeds of around 90 before I could release the pedal from the fully down position).

- Le Center, MN, USA

problem #3

Apr 032015

Sonata 4-cyl

  • 2,000 miles
Sonata comes with a 18.5 gal gas tank. Upon fill up car will only take a maximum of 12 gallons. The supposed "range" of the cars computer show maybe 50 miles when registering near empty. Even so, only 12 gallons can be put into tank. With approximately 6 gallons that have to be still in tank, I should have a range of 180 miles at 30 miles per gallon. Gauge is in need of calibration apparently. Dealer claims to have never heard of this issue even though it happens upon every fill up.

- Rochester, NY, USA

problem #2

Feb 142015


  • 1,400 miles
Brand new car purchased and few issues. 1. gas gauge only goes up to 7/8 even with full tank fill up. 2. gas mileage does not seem to indicate correct mileage. With full tank gas, the indicator shows 450+ miles, but actual mileage is 300~350 miles. 3. error occurs when playing songs from iphone 6 using usb cable.

- Diamond Bar, CA, USA

problem #1

Feb 042015

Sonata 4-cyl

  • 9,720 miles
Since leasing the vehicle on August 1 I constantly complained about the gas mileage which Hyundai indicated would be resolved on the following oil change. The oil change barely effected the mileage efficiency which leads to the second issue when the gas gauge shows below a quarter on the tank the cruise control does not work and is also affected in high mountain areas. When I explained these issues to Hyundai they said they never heard of it and would sent to the company for further review in the meantime I have a car with the gas gauge that does not show exact amounts from fill up to empty makes this car a safety risk that is totally unacceptable not to mention the car is running horrible which suggest other safety features are not working accurately. The dealers look over only suggested other underlying issues exist with this vehicle and is a clear safety hazard.

- Reno, NV, USA

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