2018 Hyundai Elantra Cruise Control Problems

Your engine experienced severe internal damage (grinding metal/piston failure) and was replaced in November 2024 along with spark plugs. The same problem returned in July 2025, and the dealership suspects the ignition coils from your original engine replacement may be failing—they mention Hyundai ignition coils have known design issues with high failure rates. However, the dealership couldn't confirm this was the cause. You were not informed about this potential issue before experiencing the problem again. The repair will likely involve replacing the ignition coils and possibly additional engine inspection.

I was driving about 45 mph when the car just turned off the first time. I was able to put it in neutral and start it back up to get to the side of the road and it died on me again. I was about 30 feet from my destination at this point so I got it where I was going and turned it off. When I turned it back on it was making a terrible knocking/grinding noise. It didn’t have a drop of oil in it (about a thousand miles after my last oil change mind you) so I put oil in it and started it again and the sound quit. I went to drive it and it died before I could accelerate to a decent speed, got it cranked and rolling again and it slowly got up to 40 mph, but the second I started to slow down again it would die. So I had it towed to my mechanic who at first thought it was because the timing chain had a lot of slack in it, assuming it jumped time so he changed that, but it was still dying. He ended up finding the cause to be the exhaust cam sprocket? I’ve never heard of this before but I do know that ever since I bought the car 3 years ago it never felt like it would get up and go whenever I hit the gas. Since I picked it up from being fixed, this thing zoom zooms everywhere now! But it is still using an ungodly amount of oil between oil changes.

When I drive my car shuts off in the middle of driving in traffic I almost got into an accident with my kids in the car The dealership doesn’t know what’s the problem they fixed a code of p0011 can anybody help because it’s a safety hazard with me and my family in the car please help feel like I’m just wasting money

We own a driving school. My husband was giving a road skills test for a student in our 2018 Hyundai Elantra. For unknown reasons the car rapidly accelerated. He told the driver to get off the accelerator. She said she was not on the accelerator. He looked over and her foot was on the brake. We have an instructor's brake and by pressing it my husband was able to overpower the Elantra accelerator They missed another car by inches, but he was able to stop the car. They continued down the road and the car's rpms where high. He tested the car by putting the transmission in neutral, The car revived but the student's foot was on the brake. They continued to the office using the instructor's brake to control it. After the car was shout off and restarted It never had this same issue. We just brought it to the dealership for inspection of problem. Our mechanic looked at the car but could not find a reason for the problem.

While driving at any speed, vehicle momentarily does not respond to any gas pedal input. Driver presses on gas pedal but no change in speed, no rpm change no warning lights on dash. After a few seconds vehicle responds again randomly. Puts driver at danger due to not being able to same speed as traffic very dangerous!

I AM DRIVNG DOWN THE HIGWAY AND I HAVE IT ON CRUISE AND IT WILL JUMP UP IN SPEED BY 3-7 MILES AND THAT IS GOING STRIGHT NOT DOWNHILL OR UP HILL THEN WHEN I TRY TO SLOW DOWN USING CRUSE IT WILL NOT SLOW DOWN I HAVE TO ALL MOST BREAK THE BUTTON WHEN TRYING TO SLOW DOWN AND IT NEVER DID THAT BEFORE THIS JUST STARTED TO HAPPING

TL* THE CONTACT OWNS A 2018 HYUNDAI ELANTRA. THE CONTACT STATED THAT THERE WAS A SUDDEN LOSS OF ACCELERATION WHEN THE ACCELERATOR PEDAL WAS APPLIED. THE VEHICLE WAS TAKEN TO THE DEALER (EMPIRE HYUNDAI INC, 428 PLEASANT ST, FALL RIVER, MA 02721, (508) 673-7646) MORE THAN TWICE, BUT THEY COULD NOT REPLICATE AND DIAGNOSE THE FAILURE DUE TO NO DTC. IN ADDITION, A SERVICE TECHNICIAN TEST DROVE THE VEHICLE AND WAS UNABLE TO DUPLICATE THE FAILURE. THE MANUFACTURER WAS NOTIFIED AND INDICATED THAT THEY WOULD PROVIDE A FOLLOW-UP RESPONSE TO DETERMINE A SOLUTION. THE APPROXIMATE FAILURE MILEAGE WAS 50. *TT *TR