2023 KIA SORENTO HYBRID Fuel/propulsion System Problems

While driving on September 15, 2025, the vehicle displayed a loud beeping and the warning message “Check Hybrid System. Stop Safely.” The vehicle restarted about an hour later, but the combustion engine ran very rough. The Kia dealer inspected it but reported no stored error codes. On September 23, 2025, the vehicle suddenly lost power while driving. It appeared to operate only on electric at low speed, then died completely in the roadway. The vehicle would not power down until the start/stop button was held. It required a tow back to the dealer. Prior to the first incident, a faint electrical smoldering odor was present. The vehicle remains at the Kia dealer for evaluation. This is a serious safety concern because the vehicle experienced sudden loss of motive power and stalling in traffic, which put both myself and others at risk. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Vehicle suddenly loses power while driving. Engine does not turn on, vehicle will run on battery until battery is dead, then putting the vehicle in park once stopped. Vehicle will not accelerate normally since the engine does not turn on. Only goes 10-20 mph. Lights on the dash come on, prompting to keep car on to charge the battery. No code is found when the vehicle is scanned. Dealerships can't seem to diagnose the issue. This is a safety concern when driving on busy roads or state highways at higher speeds.

Critical Issue: Gasoline leaks into engine. That causes increasing engine oil level significantly and mixed with engine oil. I dropped off me car (mileage: 11731) at Kia Pro in Glendale, CA on 5/1/2025 as soon as I confirmed that engine oil level exceeds the maximum (twice of max) and smelled Gasoline from the dipstick. The service advisor and a tech confirmed that the excessive engine oil level and gasoline smell. However, they refused to repair it under warranty because they don't see any physical leaks and error codes. In addition to that, they told me that the car is not good to drive as is because Gasoline is mixed with engine oil. In my opinion, this can cause critical powertrain failures or possible life-threatening damages if that initiates fire from engine. Car maintenance history: at 6312miles, 1 oil change change at Kia in Alhambra, CA I have attached the service receipt on 5/1 for your reference. That shows that the dealership confirmed the issue but they didn't try to resolve the issue.

While I am driving and try to give the car gas to speed up quickly it loses all power and won’t go faster, to speed up I would have to slow down and slowly gain up to the desired speed. It gave me a warning message that I need to park and charge the battery. I don’t have a spot to charge the battery.

While slowing from cruising speed to around 5 MPH, give or take, and pressing on the accelerator, the vehicle will not respond/accelerate for up to 1 second. This is dangerous because you don't know when the vehicle will respond and if you'll have the acceleration. My assumption is this is a symptom of the hybrid system trying to determine the best mode of propulsion - gas, electric only or a combination of both. We've taken it to the dealer and we were told "this is how hybrid systems work." We've owned Toyota hybrid systems and we know this is not normal. Kia/Hyundai should reprogram the hybrid system to that it responds with no delay, even if it means the fuel milage suffers as a result.

This is the third time my car has had code p0171 and p0191 pop into the system of the car. I just picked up my car on [XXX] and after I left the parking lot it didn't feel right. I had to press the gas pedal a lot harder to get it to move. This is after they replaced the high pressure fuel pump twice within a week and I believe under 200 miles of driving the car. Luckily Florida is a pretty flat state so the hill I have between my work and home isn't very steep but I go from 40 mphs down to 30 once I reach the top of it. I'm supposed to be going from Florida to North Carolina and I don't know how it's supposed to climb the mountains. The first time my car had this problem was [XXX] the second time [XXX] and the third time was [XXX] and the last issue was [XXX]. The first 3 times it went into limp mode where it won't run the components completely. The last time I had to press the gas pedal all the way so I wouldn't be hit by other vehicles. I only had warning lights the one time but error codes on 3 of the 4 times with last time barely leaving the dealership so I wasn't able to check. It's a safety issue when you have to pray that it gets enough to merge into traffic or to stay ahead of cars where it cause cars to slow down or possibly hit me if they think I would be going faster. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

I was driving home from work when I felt my car was in a limp like a previous problem I had except this time I had a check engine light come on. I was almost home and I had a check hybrid system pop up on my dash and the car basically stopped driving. Luckily I was on a side street. I had a p0171 code on both of my issues . I had it fixed about a month and half ago the first time but couldn't say what caused the issue.

At times vehicle hesitates or doesn't responses when accelerator is pushed. Has occurred several times when moving into traffic from a yield lane or stop. Fortunately it hasn't lead to an accident but was very scary. Researching this problem on-line, this has been reported by many Sorento owners. This is an intermittent problem and when vehicle is taken to the dealer they report they can not duplicate problem so nothing is done. By the shear numbers of owners reporting the same issue, something needs to be corrected.

Vehicle loses power from combustion engine and drives only on electric battery. Hybrid system doesn’t engage correctly and vehicle will accelerate extremely slowly after a delay and will only achieve roughly 30 mph with accelerator fully pressed. This vehicle has been sent to the dealer multiple times and they have recreated the problem. However even after parts being replaced and connections being replaced the problem persists. Vehicle can be inspected anytime. My family has been in several near collisions with oncoming traffic due to the vehicle moving after a delay and then at a much slower than expected pace. Pulling out in to traffic is nearly impossible when the vehicle malfunctions. It has also depleted the entire battery and left us motionless on the side of the road multiple times. Due to the problem being intermittent and not reliably duplicated a service technician was given permission to use the vehicle to commute to and from work for a time. This allowed him to experience the issue in person. The vehicle has been inspected multiple times by the dealers service department and they have been working with engineers from the manufacturer. When this problem occurs there typically is not a warning light or a code stored. They believe it is a faulty connection. This issue will cause an accident in the future if not resolved. The manufacturer has not been able to determine what is causing the issue. They also have not been concerned with our safety and have released the vehicle back to us 3 times stating that it is fixed yet the problem persists.

While driving on Oregon I-205 south bound received a refill inverter coolant warning. I was on my way to the dealer for other issues and decided to let the dealer fix it. About five miles down the freeway I began to lose power. I was in the center lane and had to move over two lanes of traffic while losing more power. Luckily I made it across with the help of a few understanding drivers and many horn honkers so there was no accident. I turned off the engine and called Kia roadside assistance. After about 15 minutes I was connected to a Kia assistant who after a few minutes asked if the engine would start and it did. I was then directed to try to make it to the nearest Kia dealer which was about 8 miles away. The car went the first seven miles with no problem but then I started to lose power again. I was doing five miles an hour tops when I pulled into Weston Kia in Gresham, Ore. I left my car at the dealer. I was called the next day to tell me that a small piece of metal (road debris) had flown through the air intake space below the grill and hit the invertor radiator and that the invertor radiator reservoir was empty causing the car to lose power to save the engine. Luckily they had an invertor radiator in stock and I got my car back six days later. It was not covered by warranty because it was not a manufactures defect. The cost to repair was almost $1100. I question this. I googled this problem and found out that I am not the first person to have this exact problem happen to. If the air intake to the invertor radiator had some protection (1/4 inch mesh) or the invertor radiator were behind the grill this would not of happened. This, in my opinion, is extremely dangerous and would have very easy fix. I asked to keep the old radiator and I have documentation from Weston Kia covering the repair.