2014 Hyundai Sonata: hesitation when accelerating

Filed Oct 7, 2023 · Fuel system · PA

There was the strong smell of gasoline so the vehicle was then parked outside of our garage. We had a scheduled appointment with our independent mechanic to have this looked at. Prior to the appointment, the Check Engine Light came on and was also flashing. The car was performing very poorly at this time. When the gas pedal was applied to accelerate the car sputtered and severely hesitated. We pulled off of the highway to a city street and then a parking lot to call for a tow to our mechanic. Upon inspection he found that a fuel line was leaking. He looked up to see if there were any Hyundai Technical Service Bulletins related to the issue. He found "Fuel Tube Replacement (Recall 227). Due to the recall we contacted the dealer Piazza Hyundai of Limerick (PA). The service representative (Jason) looked at the recall and stated our vehicle was not a part of the production line being recalled. All items in the recall were found on our car. We had our independent mechanic fix the fuel line. Prior to the repair the car was not in a drivable state.

Filed Jun 9, 2023 · Engine · 88,130 miles · CA

The contact owns a 2014 Hyundai Sonata. The contact stated while driving approximately 60 MPH the accelerator pedal was depressed, and the vehicle hesitated. The contact stated that the "check oil" warning light was illuminated. Additionally, the contact heard an abnormal knocking sound coming from the engine compartment. The contact had taken the vehicle to a dealer who diagnosed the vehicle and determined there was an oil leak. The contact took the vehicle to an independent mechanic who diagnosed the vehicle and stated that there was no oil leak; however, the engine was consuming an excessive amount of engine oil. The vehicle was not repaired. The contact researched online and related the failure to the federal safety agency Campaign Number: 17V226000 (Engine and Engine Cooling). The manufacturer had been informed of the failure. The failure mileage was 88,130.

Filed Sep 7, 2022 · Fuel system · 99,180 miles · CO

The contact owns a 2014 Hyundai Sonata. The contact stated that on numerous occasions while attempting to accelerate, the vehicle hesitated and then stalled. No warning lights were illuminated. The contact referenced the federal safety agency Campaign Number: 22V312000 (Fuel System, Gasoline). Additionally, the contact stated while attempting to accelerate, she heard a loud noise coming from the engine and noticed a dark cloud of smoke. The contact was able to drive the vehicle to her residence. The dealer was not notified of the failure. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure and the contact was provided a case number. The failure mileage was 99,180.

Filed Jul 12, 2022 · Engine · 70,000 miles · IL

The contact owns a 2014 Hyundai Sonata. The contact stated that after refueling her vehicle, the vehicle hesitated upon depression of the accelerator pedal without warning. The contact attempted to restart the vehicle but the vehicle failed to restart. She initially towed the vehicle to her home and the next day to her father's home. Her father replaced the starter but that failed to repair the vehicle; the vehicle was then towed to the dealer where they discovered sludge in the engine. The dealer requested oil change service receipts, which the contact provided; however, the dealer declined to repair the vehicle under warranty. The manufacturer was also notified of the failure but sided with the dealer on the decision to not repair the vehicle. The vehicle was not repaired. The failure mileage was approximately 70,000.

Filed Aug 8, 2020 · Fuel system · 58,000 miles · FL

Experienced slight hesitation upon normal go stop driving rural and city roads. Service for the federal safety agency campaign id number 20v121000 number:189 performed at obrien hyundai, ft. Myers fl, 7 aug 20. Tech showed me a blue strip which he claimed was used to detect presence of a gasoline leak when applied to suspected original gasoline tube, campaign number: 189. Tech then mentioned that result displayed no apparent leak at present time, but could not guarantee or rule out a future leak. Process is to be performed at service intervals as part of regular multipoint inspection to rule out existence of possible leak of original installed and never replaced campaign part to safe guard life of driver and passengers of potentially original defective fuel tube, 2014 hyundai sonata 2.0t.

Filed Jun 29, 2020 · Fuel system · 68,000 miles · FL

Tl* the contact owns a 2014 hyundai sonata. The contact received notification of the federal safety agency campaign number: 20v121000 (fuel system, gasoline) however, the part needed to repair the vehicle was unavailable. Carmax of tallahassee located at 3500 w. Tennessee st, tallahassee, fl 32304, and the manufacturer were notified of the issue and it was confirmed that the part was not yet available. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The contact also stated that the vehicle hesitated while accelerating. The cause of the failure was not determined. The failure mileage was 68,000. Vin tool confirms parts not available.

Filed Jun 26, 2020 · Fuel system · 40,000 miles · KY

Tl* the contact owns a 2014 hyundai sonata. The contact stated that while driving at an undisclosed speed, the accelerator pedal was depressed and the vehicle hesitated without warning. The contact then received notification of the federal safety agency campaign number: 20v121000 (fuel system, gasoline) however, the part to do the repair was unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the failure. The vehicle was not repaired. The failure mileage was approximately 40,000. Vin tool confirms parts not available.

Filed Jun 19, 2019 · Electrical, Engine · 46,000 miles · PA

On 4/19/2019, I was driving my car at 60 MPH on freeway and suddenly car's speed dropped to 20 MPH with check engine light (mil) blinking. Also car was hesitating and wasn't going beyond 20 MPH after that. It went into limp mode / low power mode. I got my car towed to hyundai's dealership on 4/20/2019. I was informed that there was an issue with the knock sensor harness and it has been replaced under campaign t3g. I picked up my car from the dealership on 4/23/2019 but my car is still having knocking sound, car is hesitating and I got the engine light (mil) back up again on the very next day I.e. 4/24/2019. My car is at the same dealership since than for the repair and they are waiting for the parts from the hyundai factory. I also contacted hyundai consumer affairs center for this and case#: 15700612 has been created for this complain.

Filed Jun 11, 2019 · Engine · 86,000 miles · FL

This is an on-going issue. Originally began mid march of 2019. Thus far all have been covered by warranty. Luckily, I'd just gotten off of I-95 when the following symptoms began. The engine light flashed, car only accelerated to appx 30 MPH, hesitated and sputtered, as if it wanted to stall. On the occasion in march my car, with appx 82,000 miles, was towed to dealership. On, or about, april 5th I was told one of two issues are involved. One was the wiring harness (knock sensor) or engine replacement is required. Hyundai authorized the knock sensor replacement and I received the car on april 14th. I f I recall correctly, the knock sensor was a recall issue. All was seemingly fine until june 10th. At that time, the same issues I described above happened, including that the speedometer indicated I was traveling at 60 MPH when I was probably travelling at 30-35 MPH. My car was towed to hyundai, again, and I am now awaiting their diagnosis. I don't feel anything less than engine replacement will be acceptable at this time.

Filed Apr 24, 2019 · Engine, Transmission · PA

Was driving my car at 60 MPH on freeway and suddenly car's speed dropped to 20 MPH with check engine light (mil) blinking. Also car was hesitating and wasn't going beyond 20 MPH after that. This happened on last friday 4/19/2019. I got my car towed to dealership (fred beans hyundai of doylestown, pa) on 4/20/2019. I was informed that there was an issue with the knock sensor harness and it has been replaced under campaign t3g. I picked up my car from the dealership yesterday 4/23/2019 but my car is still having knocking sound, car is hesitating and I got the engine light(mil) back up again today 4/24/2019.

Filed Apr 4, 2019 · Electrical, Engine · 68,000 miles · NJ

The software update per hyundais "953" service campaign, when activated, reduces engine performance which could lead to accidents (due to insufficient acceleration, etc.). I had the recent engine software update per hyundai's 953 campaign. On 3/22/19, I exited a highway and slowed down prior to merging onto the next road. I needed to accelerate, however my engine bogged and hesitated significantly. As such, another car quickly approaching had to break heavily to avoid a collision with my car. I looked down and observed my engine light flashing. I took the car in to action hyundai (millville, nj), and they stated that the newly installed software had detected issues with my engine and automatically placed my engine in this low-power mode. I have since learned that I will be receiving a warranty engine replacement.

Filed Sep 9, 2017 · Engine, Transmission · 47,350 miles · MD

Takata recall - car is blowing out smoke - in 700 miles it has lost 2 quarts of oil, it has under 50k miles, it is covered under 2 different recalls thru hyundai but they refuse to replace the engine, when you try to accelerate - the car will hesitate and then all of sudden blow smoke out the back - so much that you think the car is going to catch on fire, we have had it in the dealership 3 times already - contacted them other times in between. Now when trying to accelerate at just 1 RPM smoke comes out the back car starts shaking like its going to stall out check enginge light comes on - a few seconds later big cloud of smoke comes out back and car will then move leaving trails of smoke behind. Check engine light went off. Hyundai said unless the check engine light is on - it wont matter. They just want us to do a oil consumption test - the engine is making a knocking noise. Hyundai has heard it too. We leave so much smoke that we cant see a car behind us. It can barely make it to accelerate on the highway. 6/21/17 - massey hyundai hagerstown 7/18/17 - massey hyundai hagerstown 8/28/17 - massey hyundai hagerstown hyundai case #10553414 - they know about it! We have had it towed to the shop 2 times now.