Kia Sportage hesitation problems

Filed Aug 13, 2026 · Engine · TX

2018 Kia Sportage (78,051 miles). Vehicle is part of the Kia Engine Class Action Settlement due to severe internal engine defects. The engine suffers from catastrophic oil consumption, running almost completely dry three times in less than six months with no external leaks, meaning it is internally burning motor oil at a dangerous rate.This known engine defect caused severe consequential damage to the exhaust and emissions systems. On Aug 12, 2026, a Kia dealer technician diagnosed active code P0420. The technician's video inspection stated both the catalytic converter and O2 sensors are completely "out of specification." This double failure is a direct result of the engine defect blowing excessive liquid motor oil out of the engine block and down the exhaust pipe, fouling the sensors and melting the internal catalyst.This failure happened immediately after receiving the mandatory Kia Recall SC340 update (Catalyst Overheating Protection). The vehicle is under the 80,000-mile Federal Emissions threshold, but Kia is denying coverage based strictly on a calendar time limit. They refuse to take responsibility for emissions components destroyed by their settlement-recognized engine defect.This condition poses a serious safety hazard. Driving with heavily fouled O2 sensors and a failing catalytic converter causes poor engine performance, unpredictable stalling or hesitation during acceleration, and excessive unburned fuel vapors to enter the environment and potentially the cabin. I request the federal safety agency investigate Kia’s refusal to cover secondary emissions damages directly triggered by their defective oil-burning engines.

Filed Jun 17, 2026 · Electrical, Engine · 18,700 miles · OK

The contact owns a 2024 Kia Sportage. The contact stated that while driving at undisclosed speeds, or while the vehicle was parked, the engine intermittently hesitated and the vehicle almost shut off. The contact stated that the START/STOP button was depressed to shut off the vehicle; however, the button became inoperable. The vehicle was turned off and restarted to resume normal operation. The vehicle was taken to a dealer, but the failure could not be duplicated. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 18,700.

Filed Nov 28, 2025 · Brakes, Engine · CO

My 2023 Kia Sportage AWD has several ongoing safety issues that have been happening for over a year. The car stalls or hesitates at low speeds and during acceleration. I hear grinding or whining noises from the front end and drivetrain. My brakes wore out very early and still feel inconsistent, and the automatic braking acts unpredictable. The AWD system sometimes feels unstable when I try to accelerate. The tire pressure warning light comes on often even when the tires are fine. These issues happen randomly and make the car feel unsafe to drive. I am reporting this for safety investigation.

Filed Nov 18, 2025 · Brakes, Electrical · PA

Initially in May 25, my Sportage started accelerating on its own, unprompted, up to 4500 RPMs many times and also hesitated. In 6/25 the info screen, (whole dash) went black 4-5 x’s for about 3minutes while driving 60 mph on bypass. Beginning of July, Siri didn’t work and said it was inaccessible, and also the navigation said it was not updated however, when I pulled into the dealer, all of a sudden it worked? On 7/23 I was turning into apt complex and had no brakes! I had slowed to about 20mph, car behind me, and couldn’t make that turn so I coasted up to next entrance and was able to turn in. Fortunately, I was able to stop in my handicap pkg spot. I had already made appt for the initial issues at the dealer, Moyer Kia in Lebanon, for first week of August, but immediately called them on 724 and explained the absence of breaks! They told me to get car there right away, so I did. I gave a list of all above info, they were able to give me a loaner, Kia G6. This was very inconvenient for me as most of my back is fused and I provide transport for my [XXX] /o mom w/Walker, but I can’t go w/o a car! Moyer has had my car since 7/24,. With the exception of need for miles on the loaner communication was poor. I tried to reach Kia Corp multiple x’s to no avail. I was told by Brian at dealer that my case had been escalated to the national safety board and they were advised not to touch my car pending investigation. So it sat there for months I got a message from Kia Connect that my battery was dead, more communication than I had received throughout this whole experience! Last week, Thursday I had called corp who said they sent me an email on 1023 to tell me nothing is wrong with my car, they also emailed the dealer. I hadn’t checked email, nor did they call, so I didn’t know, dealer called me on Friday to come and get my car, but first they had to grind the rust off of rotors, recharge the battery and would I like them to inspect it?, NOTHING IS WRONG? THIS CAR is NOT SAFE!!!! INFORMATION REDACTED PURSUANT TO THE FREEDOM

Filed Oct 7, 2025 · Engine · 99,000 miles · CA

The contact owns a 2014 Kia Sportage. The contact stated that while driving 75 MPH, the vehicle jerked and failed to accelerate as intended while depressing the accelerator pedal. The check engine warning light was illuminated. In addition, the vehicle hesitated and failed to exceed 40 MPH. The contact exited the freeway. The vehicle was taken to Auto Zone, where it was diagnosed with a knock sensor failure. The vehicle was taken to an independent mechanic who replaced the knock sensor however, the failure persisted. The contact stated that on a separate occasion, while driving 70 MPH, the vehicle failed to accelerate as intended while depressing the accelerator pedal. The vehicle hesitated and failed to exceed 40 MPH. The contact exited the freeway with the check engine warning light intermittently illuminated. The vehicle was taken back to the independent mechanic, who diagnosed that the knock sensor had failed. The independent mechanic advised the contact to stop driving the vehicle. The vehicle was not repaired. Most recently, an abnormal sound was coming from the engine. The manufacturer was not notified of the failure. The failure mileage was 99,000.

Filed Sep 15, 2025 · Engine · 93,000 miles · PA

The contact owns a 2020 Kia Sportage. The contact stated that while driving at various speeds, the oil warning light flickered on the instrument panel. While the contact's son was driving the vehicle at highway speeds, the vehicle hesitated while depressing the accelerator pedal. The contact's son pulled off to the right shoulder of the highway, and the vehicle entered LIMP Mode. Despite the failure, the driver was able to drive the vehicle back to the residence. The contact called the dealer and made an appointment to have the vehicle serviced. While driving the vehicle to the dealer, the failure occurred again, and the vehicle failed to accelerate above 10 MPH. Due to the failure, the contact took the vehicle to a dealer, where the vehicle was diagnosed with engine failure. The following day, the contact called the dealer and was informed that the engine had not failed, and a knock sensor test was performed which restored the engine function. The contact then took the vehicle to an independent mechanic and was informed that the engine was consuming an excessive amount of engine oil. The vehicle was taken back to the original dealer, where an appointment had been scheduled. The dealer performed a series of oil consumption tests and monitored the oil consumption every 1,000 miles. After four consumption tests, the contact was informed that the engine was consuming an excessive amount of engine oil. The contact took the vehicle back to the independent mechanic and was informed that the oil consumption had worsened, and that the vehicle had consumed 4 quarts of oil in less than 5,000 miles. The manufacturer was not notified of the failure. The vehicle had not yet been repaired. The failure mileage was approximately 93,000.

Filed Jun 16, 2025 · Brakes, Engine · AL

The issue appears to involve the CVT (Continuously Variable Transmission) system or the transmission fluid/lubricant pump. The vehicle jerks or hesitates when accelerating from a stop, as if struggling to shift properly. The check engine light comes on repeatedly. This issue is ongoing, and the vehicle is available for inspection upon request. The jerking and hesitation when trying to drive, especially from a stop or when merging into traffic, poses a safety risk to myself and others. The delayed or unpredictable response could easily lead to an accident in high-traffic areas, intersections, or when making turns. Yes. The issue has been observed multiple times. The check engine light has returned even after replacing the O2 sensors, and a trusted mechanic believes the problem may be transmission-related. However, the Kia dealership claims there are no active recalls tied to my VIN, even though publicly available information lists powertrain- and fluid pump-related recalls for my vehicle's year and model. The vehicle has not yet been inspected by Kia corporate. I reached out to the local dealer, who denied any applicable recall. I am submitting this complaint in hopes of an official review and inspection by the manufacturer or the federal safety agency to determine if the issue qualifies for safety recall intervention. Yes. The check engine light first appeared months ago, which led to replacement of the O2 sensors. Shortly after the replacement, the light returned, and the car began jerking while trying to drive or accelerate from a stop. These symptoms have persisted and appear to be worsening.

Filed May 25, 2025 · Engine · AL

Me and my family were on the way to the beach, as I accelerated on the interstate got to 65 mph, engine light started blinking, car instantly slowed down. Got off on next exit, to check and see what was going on, car started hesitating after acceleration. Was able to get it to an autoshop (O'Reilly's) diagnosis shows knock sensor failure and they told me it has to do with the safety recall, didn't even know the car had a recall on it.

Filed Feb 4, 2024 · Transmission · MO

Transmission slips or hesitates when going from a stop to first gear. When turning left across oncoming traffic it is dangerous. The dealership looked at it and said that they couldn't get it to slip after having it for two days. No codes were thrown and no lights on the dashboard. Only slips occasionally like once a week. Always from a dead stop before going into first gear.

Filed Nov 27, 2023 · Engine · 111,500 miles · CO

The contact owns a 2014 Kia Sportage. The contact stated while driving at various speeds, the vehicle hesitated and sputtered while depressing the accelerator pedal. The check engine warning light was illuminated. The vehicle was taken to a dealer and was serviced; however, the failure persisted. After a recent failure, the contact had the vehicle towed to Infiniti of Denver (2990 S Havana St, Aurora, CO 80014) where the vehicle was diagnosed with a misfire in cylinder #2. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 111,500.