2016 Hyundai Tucson: misfire or rough idle

Filed Jan 14, 2026 · Engine · WA

On my husband's way home from work he explained to me that the car had a "hiccup" and then an engine light blinked on, then it died at an intersection. He was pretty close to home so he got it started again and drove it home. He replaced spark plugs and coil packs and it still had a misfire. We took it to an auto repair shop where they did a scan and told us it had a dead hole in cylinder 2 and that it needs a full engine replacement. The car also had an oil change just before Thanksgiving. My husband checks oil regularly and added a quart a month before the oil change and it seems to consume more oil then it should.

Filed Nov 7, 2025 · Engine · IL

My 2016 Hyundai Tucson has a severe engine defect that causes excessive oil consumption and poses a safety risk while driving. It constantly throws the P1326 engine issue, which is the knock sensor.The issue is not due to any misuse or neglect on my part. The vehicle consumes approximately one quart of oil per week, and I have been advised by two different Hyundai dealerships not to invest any money into repairs because the engine should be replaced under Hyundai’s extended engine warranty (15 years/150,000 miles).Despite multiple attempts to get the issue resolved over the past year, Hyundai continues to deny the engine replacement, leaving me with no resolution and forcing me to drive an unsafe vehicle.The engine burns an excessive amount of oil and needs frequent refilling to prevent damage.The vehicle has stalled and runs rough at times, creating a safety concern.Both Hyundai dealerships I’ve visited confirmed that this is a known issue and advised me not to spend money on repairs since the engine qualifies for replacement under the extended warranty.Hyundai corporate continues to deny coverage and has not repaired or replaced the engine despite the clear warranty terms.The issue has persisted for nearly a year, and the vehicle continues to deteriorate.I believe this defect poses a serious safety hazard because the engine can fail without warning while driving. The excessive oil consumption also increases the risk of engine seizure, stalling, or fire. I am currently forced to operate the vehicle in unsafe conditions due to Hyundai’s inaction. I am requesting that the federal safety agency investigate this ongoing engine defect and Hyundai’s repeated denial of warranty coverage for affected Tucson models. Owners should not be forced to drive unsafe vehicles or pay for repairs that should be covered under Hyundai’s extended

Filed Oct 16, 2025 · Engine, Transmission · OK

My Tucson has been using an absurd amount of oil for the past 30,000 plus miles i had it in the shop for repairs for the exhaust/ turbo leaking due to broken stud bolt that finally was covered under warranty. But did nothing for the burning of oil. No oil leaks. It used a quart for every 500 miles. Now no warranty left i have a cylinder #1 misfire and have replaced sparkplug and will not come out of limp mode. Within a mile of driving the plug is oil fouled and goes back into limp mode. Probably will get no help from Hyundai to rebuild/ replacement of the motor.

Filed Jul 11, 2025 · Engine · NC

total engine failure. per dealership mechanic, random misfires on all cylinders with a dead miss on 4

Filed Jun 9, 2025 · Engine, Fuel system · DE

Misfire, excessive oil consumption, engine knocking, loss of power/acceleration, gas smell, excessive gas consumption

Filed Oct 24, 2024 · Engine · NJ

There two incidents where I was driving in the highway and my car died mid driving. It put my life on risk twice. Took it to the mechanic and was told that my car was leaking oil and caused my car to have an engine misfire. My car is un drivable. There were no engine or oil lights that appeared prior to the incident and I always got my regular oil changes and had put in more oil myself. Hyundai refused to pay to the engine replacement even through this is a known issue. I’ve only had the car for two years and it’s under 100k miles.

Filed Aug 19, 2024 · Engine · 65,000 miles · MA

The contact owns a 2016 Hyundai Tucson. The contact stated that there was a knocking sound coming from the engine compartment. The contact stated that the low oil and check engine warning lights were illuminated. The vehicle had been taken to an independent mechanic and the contact was informed that the engine oil had been totally consumed. The contact was made aware of coolant intrusion into the engine and that the pistons were misfiring. The mechanic stated that the engine needed to be replaced. The vehicle had not been repaired. The manufacturer was made aware of the failure and stated that the Extended Warranty on the vehicle did not cover excessive oil consumption. The manufacturer referred the contact to the federal safety agency Hotline to report the failure. The failure mileage was 65,000.

Filed Apr 15, 2024 · Engine · TX

My 2016 Hyundai Tucson has had power and acceleration issues since I purchased it brand new in 2016 from the dealership. When trying to accelerate onto the freeway, or trying to turn onto busy traffic the engine would rev but not pick up speed causing a dangerous situation when traffic is present. I have had all the updates to my vehicle, but the issue did not improve. At first I thought it had something to do with the transmission, but recently I have discovered that it was probably something wrong with the engine all this time. I currently have 111,070 miles on my vehicle, and I have kept up with routine maintenance. I had noticed in the last couple of years that my engine oil was burning at an extremely high rate, and I had to keep replenishing it between oil changes. I never saw any oil leaking on the ground though. About a month ago while I was entering a freeway, my check engine light started flashing and I could not accelerate. The vehicle’s engine started misfiring and the vehicle was having a hard time switching gears. Fortunately it was early in the morning before rush hour traffic otherwise I would have been hit by oncoming traffic. I had the codes read and they came back as P0300, P0302, and P0304. I had already had the spark plugs replaced less than 10,000 miles prior to this, so we tried changing the ignition coils. That did not help, so we changed the spark plugs too. This still did not solve the problem. A mechanic ran a compression test and determined there is a problem with the engine. I have read numerous other complaints online now about similar issues with the 2016 Hyundai Tucson engine failure with less than 150,000 miles that put people in harms way while driving down the road. The engine failure is occurring even with regular maintenance.

Filed Jul 23, 2023 · Engine, Fuel system · CA

There are four safety concerns I have with the 2016 Hyundai Tuscon: 1.) The Check Oil light failed to illuminate indicating the need for more oil. 2.) The excessive oil consumption may have caused my catalytic converter to misfire and melt. 3.) The Check Engine light failed to illuminate when my catalytic converter misfired and melted. 4.) The Knock Sensor (if it is bad), which is installed on my vehicle, could fail and not warn me about any engine problems. On 7/3/23, my vehicle was having a difficult time accelerating up a mountain. My brother and I also heard a rattling noise, so my brother drove to a safe place. I had my vehicle towed to a local auto service garage, where I was told the catalytic converter melted due to misfiring and that I needed to replace it. On 7/5/23, I had my vehicle towed to the closest Hyundai Dealership, where they confirmed that the vehicle's catalytic converter was melted due to misfiring. After researching the causes catalytic converters misfiring, I read several complaints about the said vehicle's oil consumption and poor acceleration. I suspect there might be a connection to the catalytic converter misfiring and melting. Incidentally, I have had two other incidents where my vehicle lacked acceleration and started shaking. One occurred on 12/28/22, while I was entering an intersection. The other happened on 4/1/23, while I was attempting to pass another vehicle. All three incidents could've ended tragically. The Check Engine light did illuminate during two of the incidents, but not the incident that occurred on 7/3/23. Additionally, the catalytic converter was previously tested on 12/31/22 and it didn't have any bad codes. Sparkplugs were also replaced on 12/31/22, and a 3-Step Fuel System Cleaning was done on 6/12/23. The Check Oil light only illuminated once since I have owned the vehicle, but failed to illuminate when my oil was getting low in between oil changes. My SUV is still in service waiting for a Catalytic Converter.

Filed Jun 26, 2023 · Engine, Fuel system · FL

Similar to other owners my car has been burning oil at a higher-than-normal rate. Because of this, there has been a carbon build-up causing my engine to start misfiring and stop working while driving on the interstate.

Filed Mar 8, 2023 · Engine · VA

My car is currently around 126,000 miles. I got a tune up last year. About a week ago the car started to jumping and driving very slowly while I was on the highway. The check engine light started flashing so I pulled over. After a few minutes I attempted to drive up and the car made it. I spoke with my mechanic and scheduled to bring it into him after getting the check engine light code read. The codes were related to a misfire on spark plug 2 and 4. I then had those replaced. When picking up the car, my mechanic let me know that the engine was producing metal shaving and they were getting on the spark plugs which was causing the issues to keep according. He let me know I would probably need a new motor. After doing some research I found Hyundai Tucson around my same year have a similar issue with the motor going out very early in the cars life. I’m not sure why they weren’t already included but I believe the 2016 Hyundai Tucson need to be investigated for the issues as well. The car is only worth $7,000 with a working motor so it doesn’t make sense to buy a new engine but I still own payment on this vehicle and it’s completely unfair for Hyundai to vehicles like this and not take accountability. I’m planning to get the code read on the car again and actually write down the number so I can reference it here for you information.

Filed Mar 4, 2023 · Engine · TX

I am referring to two notices; see attached. Inability to accelerate from a Stop and Rough idle in drive. The dealership, DeMontrond Hyundai Service Center will not repair as a recall. Please advise. Thank you, [XXX] [XXX] [XXX]. Due to this problem, the car is hesitant to accelerate which causes problems INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).