2023 KIA Sportage Hybrid transmission problems

POWER TRAIN

My 2023 Kia Sportage EX Hybrid has experienced repeated engine-related failures since October 2022, requiring multiple dealer repairs. The safety issue escalated in 2026 when the vehicle experienced sudden loss of acceleration while driving on highways. In April/May 2026, the vehicle lost acceleration twice within approximately 10–15 minutes. Warning messages appeared, including Check Engine Light and "Check Hybrid System – Stop Safely." The accelerator became unresponsive, requiring the vehicle to be moved to the shoulder. The dealer diagnosed P0030 and P1120 and replaced the Bank 1 Sensor 1 oxygen sensor and valve cover assembly with manufacturer technical support involved. Several months later, another highway loss-of-acceleration event occurred. The vehicle would not respond to the accelerator, RPM remained around 1,000, and it had to be safely moved off the road. The dealer diagnosed P2138 and replaced the accelerator pedal assembly. The repeated unexpected loss of acceleration creates a serious safety risk. The root cause remains unknown despite multiple repairs.

NHTSA complaint #11754862 — an unverified report by a vehicle owner.

POWER TRAIN

On XXX and XXX, while driving on the highway, the vehicle suffered a sudden, complete loss of motive power. Flashing warning lights appeared on the instrument cluster, accompanied by a safety warning message instructing the driver to pull over and "Check Hybrid System" immediately. This sudden, uncommanded drop in propulsion on active, high-speed roadways created an immediate safety hazard, forcing emergency maneuvering to coast the vehicle safely to the shoulder. The vehicle was delivered to an authorized franchise dealer (Arapahoe Kia in [XXX]) on XXX, where it has now remained grounded for 31 consecutive days. The service department has verbally communicated extreme diagnostic confusion, stating they lack an on-site hybrid specialist to properly diagnose the high-voltage powertrain/HPV/hybrid battery system. The vehicle has historically received software updates under Campaign SC335A, and the symptoms reported here closely align with the loss of motive power issues addressed in Voluntary Emissions Service Campaign SC338. To date, neither the dealership nor the manufacturer (under Case #XXX) has provided a formal written diagnosis, a repair schedule, or an active resolution. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint #11750948 — an unverified report by a vehicle owner.

POWER TRAIN

The car's transmission became unresponsive and caused the car to lose the ability to accelerate. This happened twice on the highway before I could get it to the dealer. In order to recover, I had to pull over on the shoulder and turn the car off, wait, and turn it back on. The dealer, through the Kia warranty service, would only 'recalibrate' the transmission and refused to service it. After the recalibration, the dealership wanted to give me back the car. I insisted that they took it for an extended test drive in which it stalled for them as well. Kia warranty then authorized the replacement, and I am awaiting its completion.

NHTSA complaint #11748310 — an unverified report by a vehicle owner.

POWER TRAIN

The AC compressor failed on my 2023 Kia Sportage Hybrid after 2 1/2 years of service and 59,800, mostly highway, miles. This affected the vehicle's drivetrain and it ground to a halt many times with a message "Check Hybrid System" displayed on the dashboard. The problem occured randomly and initially every few minutes when the vehicle was stopped at traffic lights, creating a real danger of being rear-ended by other cars.

NHTSA complaint #11732100 — an unverified report by a vehicle owner.

POWER TRAIN

3 times in the last two days, and dozens of times over the last six months, while driving or while idling, the "check hybrid system" warning has flashed. When it happens the car does into limp mode, where it will go no faster than 13mph. this has happened in the left lane of a highway where there is no where to pull over except the lane, since there is no time to get over before the vehicle shuts down. the car essentially will shut down in the middle of driving, no matter where it is. Especially with my kids in the car it is terrifying hazard. I have brought the car to the Kia service and since its not easily reproducible they have not been able to help and have offered no solutions.

NHTSA complaint #11719154 — an unverified report by a vehicle owner.

POWER TRAIN

The vehicle frequently fails to engage gas engine when depressing gas pedal to any degree. A full push of the gas pedal does not result in gas engine engagement. This has happened over 15 ties since the recall computer update last summer (2025). This creates extreme danger because the operator expects the full power of the engine to engage when pulling out of intersections or crossing oncoming traffic, but the engine does not engage causing a slow, creeping acceleration from the electric motor only. I took it into the Kia dealer and they found nothing wrong. No warning lights occur when the malfunction happens. And no check engine lights occur either. The only correction is to fully turn the vehicle off and back on. Doing that resets everything back to normal. This malfunction usually occurs within the first 25-30 minutes of vehicle operation.

NHTSA complaint #11713478 — an unverified report by a vehicle owner.

POWER TRAIN

Ev battery system threw up back back to earnings and codes of overcharge and then all lights on dash came on started beeping and then dash went red saying check hybrid system , hybrid system failure stop vehicle. Engine wouldn’t kick back on. I had literally just left my local Kia for a routine checkup and there report is nothing is wrong. Even tho I’ve called them now a few times about it shaking and idling super hard and going limp very often. Towed back to Kia and they have now had it for 4 days and still no results.

NHTSA complaint #11710264 — an unverified report by a vehicle owner.

POWER TRAIN

Fails to move when going from stopped to apply gas and moving forward there is a large delay and weak power. Shakes when idles and is really forcful switching from gas to battery or battery to gas,

NHTSA complaint #11693000 — an unverified report by a vehicle owner.

POWER TRAIN

February 2024 (27,813 mi): Vehicle lost acceleration while driving, would not transition from EV to engine mode, entered limp mode. Dealer replaced high-pressure fuel pump under warranty after consulting Kia Tech Line (case #[XXX]). September 2025 (58,000 mi): Vehicle will not start without manually resetting 12v battery module integrated in hybrid battery system. Pattern suggests hybrid control system defects, not resolved by previous repair. Car has now been with dealer for 4+ days figuring out this issue. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint #11690800 — an unverified report by a vehicle owner.

POWER TRAIN

While driving on the highway at 80 mph, the accelerator suddenly stopped working and was completely unresponsive. The dashboard displayed the message "Check Hybrid system. Stop safely" and a warning ding sounded. The gas engine was still operating and showing RPMs on the dashboard, but all acceleration and/or engagement with the engine was lost. I was able to coast and safely pull over to the side of the road. After pulling over, I turned off the engine and pushed the 12v battery reset button. The car restarted, and I was able to continue driving. The issue repeated about 20 miles later and again on a different drive four days later. Each time, there is no early warning or noticeable issue with the vehicle before the sudden warning and loss of power.

NHTSA complaint #11674812 — an unverified report by a vehicle owner.

POWER TRAIN

The hybrid powertrain system failed. Specifically, the vehicle remains stuck in EV mode and does not switch to the gasoline engine under acceleration, leading to complete loss of power while driving. Yes, the vehicle is available for inspection upon request. This malfunction caused the vehicle to lose all forward power in traffic. I had to pull over into emergency lanes and restart the vehicle multiple times. This is extremely dangerous and could lead to a crash, especially on highways or during merging. It puts both myself and others on the road at risk. The Kia authorized service center was able to reset the adaptive system, and the hybrid warning light turned off temporarily. However, the issue reappeared the same day. The dealer claims they cannot reproduce it and refuses further diagnosis without replication. The vehicle was only inspected by a Kia-authorized dealership. Kia Consumer Affairs has not yet conducted a manufacturer-level inspection or assigned a field technician. Yes. A “Check Hybrid System. Stop Safely” warning message appears before the failure occurs. Then check engine light was on. It first appeared immediately after a routine service (oil change, tire rotation, multi-point inspection) on 26th June 2025, just 2 days after my regular service. The warning disappears after restarting but returns intermittently, typically after the EV battery is fully drained and the car fails to switch to gas mode.

NHTSA complaint #11670660 — an unverified report by a vehicle owner.

POWER TRAIN

Intermittently, when trying to accelerate from a stop; or a near stop, the vehicle does nothing for a second or so. The vehicle also vibrates at various speeds while the hybrid system is engaged. It is dangerous and a safety concern because you can't merge correctly or go through an intersection, without wondering if someone is going to broadside you, as you wait for the car to make up its computer mind to go forward. (accelerate.) And the vibration as previously mentioned. The problems cannot be reproduced by the dealership. No inspection other than the dealership, and no warning lights, etc. The car is available for a detailed inspection if needed. I first noticed the issue around approximately 7000 miles and brought it to the dealership for both issues. I'm repeatedly told excuses: it's my rims, a balancing issue, or I don't understand how a hybrid works, etc. I told them I know a car is supposed to go forward upon accelerating, regardless of the power plant: gas, electric or hybrid; and that a car should not randomly start vibrating at various speeds when the hybrid system is engaged. I notified KIA America and have had it to the dealership three times for both issues. I get we're sorry notifications, and to call about concerns with no help. I have found complaints online for the same issues involving the very same vehicle. I cannot understand how there is no technical service bulletin or recall on this vehicle. Thank you, [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint #11655300 — an unverified report by a vehicle owner.

POWER TRAIN

I was driving my vehicle on the freeway when all of a sudden I got a warning light that came on that said check hybrid system it looked up my brakes and steering the car completely shutdown in the middle of the freeway it happened so fast I couldn't get to the shoulder my car completely just stopped. I spoke to kia and took it to the dealership and they ended up saying because it needed a update which I then called kia and let them know the situation that I almost got in a accident and that I didn't feel safe in that car and they didn't want to help.

NHTSA complaint #11644973 — an unverified report by a vehicle owner.

POWER TRAIN

Check AWD / 4WD error message while driving. Codes clear once vehicle is turned off. Dealership won't help unless they see error message. Error message only appears while driving. Potential drive train lockup issue.

NHTSA complaint #11625118 — an unverified report by a vehicle owner.

POWER TRAIN

On June 9, 2023, the owner purchased a brand-new 2023 Kia Sportage Hybrid from Quirk Kia Braintree. Over the next six months, the owner regularly drove the car between work and home, accumulating approximately 4,500 miles. However, in early January 1st 2024, the owner noticed that the check engine light had illuminated, although there were no other noticeable issues with the vehicle at that time. In response to the warning light, the owner ceased using the car and promptly scheduled an appointment with Quirk Kia for a diagnosis. When the owner attempted to drive the car to the dealership, it exhibited severe shaking when the engine was running, rendering it undrivable. Subsequently, the owner had the car towed to Quirk Kia, where it has remained since January 5, 2024. Upon examination, multiple error codes were detected, yet as of January 17, 2024, the dealership has been unable to determine the root cause of the engine's shaking. They have raised the possibility of poor-quality gasoline as a potential culprit, and they claim to have conducted tests on the fuel. Based on the email and phone communications between the owner and the dealership, the owner believe that the gasoline used was of good quality (the owner consistently refueled at Costco). Additionally, three pictures of the fuel test were shared (attached), indicating that the ethanol content in the gasoline was below 10%, which aligns with the car's manual specifications. Their proposed solution is to replace the gas tank, with the cost to be borne by the owner. The owner find this resolution to be entirely unacceptable.

NHTSA complaint #11566056 — an unverified report by a vehicle owner.

POWER TRAIN

As I was driving my 2023 KIA Sportage SX Prestige at 70+mph on highwy, suddenly "Hybrid System Failure" appeared on the dash along with evey other lights you can think of. I lost power and steering and only by the grace of God was able to safely get to the side of the road and stop. Car was at KIA dealership for 4 weeks and I was told it only needed a software upgrade and nothing was wrong with the car!! This is very dangerous and could get someone in major car accident

NHTSA complaint #11528885 — an unverified report by a vehicle owner.

POWER TRAIN

This is a heads up, not an incident report. On this vehicle there is a push button starter on the center console. Page 6-11 of the owner’s manual has a warning that reads, “Never press the ENGINE START/STOP button while the vehicle is in motion. This would result in loss of directional control and braking function, which could cause an accident.” I feel this is a hazard with an easy fix: disable the start button if the vehicle is in motion. A toddler could reach over and press the button for fun. A person could drop an object on it accidentally. I’m sure there are other scenarios where that button gets pushed inadvertently. Thank you.

NHTSA complaint #11515043 — an unverified report by a vehicle owner.