Kia Carnival check engine light comes on

Filed Oct 26, 2026 · Transmission · FL

I have taken my car 3 times to 3 different Kia dealerships for this issue. First on 9/13/2026, then 10/13/2026 and on 10/26/2026. While driving at highway speed my vehicle suddenly begins to loose power and the check engine light comes on. This is dangerous for myself as well as other drivers.

Filed Oct 12, 2026 · Fuel system · WI

Driving ar 75mph my car began to decelerate. Depressing the accelerator only made the engine rev loudly but speed continued to drop. This is a significant safety risk. There was a check engine light and message to take the car to a Kia dealer. The car was towed to a dealer. The dealer was able to reproduce the condition. The dealer replaced 24356 2M000-solenoid-cvvt (valve timing control solenoid). On the way home from this dealer the problem reoccurred. First incident on 9/13/26. Vehicle retrieved from dealer and reoccurring problem on 10/9/2026.

Filed Jul 22, 2026 · Acceleration, Electrical · VA

Incident description: While driving, the vehicle’s dashboard illuminated all warning lights (ABS, traction control, battery, check engine, forward safety system) and the engine revved to approximately 8,000 RPM with unintended rapid acceleration. Driver had to apply hard braking to maintain control and avoid a collision. A nearly identical event occurred approximately one month earlier while driving on the highway, at which point the vehicle suddenly braked hard on its own. The vehicle has been at the dealership for repair a combined 38 days across two visits. The dealer initially attributed the first event to a failed alternator voltage regulator, replaced it, but the same warning codes and behavior returned on the second occasion. Crash/injury: No collision occurred; avoided through evasive braking. Speed: Highway speed (both instances). Incident description: While driving, the vehicle’s dashboard illuminated all warning lights (ABS, traction control, battery, check engine, forward safety system) and the engine revved to approximately 8,000 RPM with unintended rapid acceleration. Driver had to apply hard braking to maintain control and avoid a collision. A nearly identical event occurred approximately one month earlier while driving on the highway, at which point the vehicle suddenly braked hard on its own. The vehicle has been at the dealership for repair a combined 38 days across two visits. The dealer initially attributed the first event to a failed alternator voltage regulator, replaced it, but the same warning codes and behavior returned on the second occasion. Crash/injury: No collision occurred; avoided through evasive braking. Speed: Highway speed (both instances).

Filed May 27, 2026 · Acceleration, Electrical · VA

For the third time the 2025 KIA Carnival Prestige I own lost power while driving on the interstate! Without warning, the vehicle would no longer respond to the accelerator pedal. No matter what I did I could not get the vehicle to accelerate past 35 mph. The minimum speed limit on the interstate is 45 mph. I had to immediately engage my hazard lights and make my way over to the shoulder of the road from the passing lane. This was a dangerous situation for me and my family and others on the highway. Warning lights came on, check engine light, charging system, and a maintenance service message. Driving in Sport mode, Smart mode, nor Econo mode could change the negative situation. This took place multiple times during the final leg of my last trip to [XXX] , extending for over 120 miles. This is a very unsafe, unreliable vehicle, that should never be driven on public roadways… especially not highways nor interstates. Three negatively, traumatic experiences is ENOUGH!!! I’m DONE!!!! INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed May 27, 2026 · Airbags, Seat belts · 2,379 miles · IL · crash

The contact owned a 2026 Kia Carnival. The contact stated while driving 65 MPH, the vehicle inadvertently hit a deer. The check engine warning light illuminated after the collision. The contact's wife was occupying the front passenger's side seat and the contact's daughter was occupying the rear driver's side seat during the collision. The air bags failed to deploy, and the seat belts failed to retract as needed. There was no reported injury. The vehicle was towed to a tow lot. The vehicle was then towed to an autobody, where it was totaled by the insurance company after further investigation. The dealer was notified of the failure. The manufacturer was notified of the failure and informed the contact that the vehicle operated as designed upon reviewing pictures of the damaged vehicle. The failure mileage was approximately 2,379.

Filed Apr 29, 2026 · Engine, Fuel system · NY

I am reporting a safety defect involving my 2023 Kia Carnival SX Prestige. On June 6, 2025, I brought the vehicle to Yonkers Kia Service Center because of a strong gasoline odor. The dealership told me the fuel tank was swollen and that the vehicle was unsafe to drive. The vehicle remained at the dealership from June 6, 2025 through October 17, 2025. Kia later indicated that the fuel tank, canister, and vent valve had been replaced. When the vehicle was returned to me on October 17, 2025, it still smelled like gas. Within 24–48 hours, the same or related safety issues returned, including strong fuel odor, loss of engine power, check engine light, abnormal fuel consumption, and later a visible fuel leak, which I documented on video. Because the vehicle did not feel safe, I stopped driving it on October 19, 2025. In March 2026, the vehicle was towed back to Kia for renewed diagnosis. Kia later reported that one fuel injector was leaking and performed additional repairs. My VIN now shows open unrepaired Recall SC368 / the federal safety agency Recall 26V232. That recall states that the high-pressure cross-over fuel pipe nuts may loosen over time, resulting in a fuel leak and fire risk. The recall warning signs include fuel smell and/or check engine light, which directly overlap with the exact symptoms I repeatedly experienced and reported. I am reporting that this vehicle had repeat fuel-related safety failures, a prior extended repair attempt that did not resolve the issue, and was previously returned to me in what I believe was an unsafe condition.

Filed Apr 27, 2026 · Transmission · OH

I purchased this 2024 Kia Carnival on 2/7/2026 with less than 10K miles. The vehicle has died while I was driving 4 different times. Twice each day that it happened. The first time was on 4/7/26. My car died on the way home from getting my kids from school after fixing a flat tire. The check engine light came on after getting a jump and when I took it to Auto Zone the battery was fully charged and the codes were for the Power Train, which didn't make sense for a brand new car. Miracle Mart told me that Kia needed to be utilized for any issues because I purchased the vehicle as is. Their solution was to tighten the "loose cables". On 4/25/26 the car died again two more times. Something is terribly wrong with this car.

Filed Apr 22, 2026 · Engine, Fuel system · FL

I was on the on-ramp getting on the highway and whenever I started to increase speed and try to get over into the next lane, I noticed the car all of a sudden jumped a little bit and then it started consistently jumping in the check engine light was flashing, and I couldn’t keep the car over what ended up being 50 mph anytime I tried to go over 50 mph. The car jumped in was shaking pretty pretty aggressively I was able to finally make it to a gas station at the very next highway stop and after I shut the car off and turn it back on it seems like it was OK, but I’m still very scared to drive it. I then took it to the dealership to have them check for any store or pending codes because after we had stopped and turned the car back on it no longer had the check engine light on, and the dealership was not able to locate any stored codes in the system to see what it happened nor were they able to replicate the issue that we had found. Is a rec out on my vehicle, but no remedy is available and notices will not be sent for another month and a half at this point I am extremely uncomfortable driving my vehicle as I have young children and anything with a fire hazard is not safe.

Filed Apr 6, 2026 · Engine, Fuel system · IA

Engine light turns on every couple months. The Kia either stops accelerating and goes into “limp mode” or gives code for misfiring cylinders. Took to dealership several times, they did nothing but reset battery so light goes off. Unsafe when driving my family around and has turned into an unreliable vehicle. SO frustrating for a new vehicle to have these issues.

Filed Apr 3, 2026 · Electrical · NM

Due to soy-insulated wiring used in wiring harnesses, rodents are attracted to the wiring components in the engine bay. Even using deterrents doesn't see to affect them. What started as a simple check engine light for what was assumed to be a faulty sensor turned into a total wiring harness replacement. Without knowing that the wiring provided an added risk to damage from external factors, there was no need to check any of the wiring. If the check engine light didn't come on, it was possible that total power loss to the vehicle could've occurred at any time, due to the various wires damaged by the rodents. We were driving on the freeway at the time when the initial check engine light came on, and a loss of power while going 65 mph could've been devastating to both our family and other drivers on the road at the same time. Insurance confirmed that the cause of the wiring damage was related to the rodents being attracted to the material, and at the dealership there were at least 2 other cars needing full wiring harness replacements due to similar damage from rodents.