KIA Forte fuel system problems

FUEL/PROPULSION SYSTEM

Vehicle won't intake gas. Cod P0451, P0456

NHTSA complaint #11750139 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

My car wasnt getting enough power and it just died while driving it on the interstate to go home.

NHTSA complaint #11747096 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

The car is jerking while driving. It's caused the car to overheat. It's hard to start up and usually stalls out. It has stalled out while driving almost causing a accident. The engine light came on. I took it for a diagnostic and it was code P0172 for high pressure fuel pump. Before the incident date it was already hard to start prior to the engine light coming on. It sometimes causes smoke to come out of the exhaust. There was also smoke from under the hood in the engine compartment and as soon as I put gas in the car it runs out very quickly. This issue could have caused and accident or even a fire. It's unsafe to drive and from other reviews I've seen several other Kia drivers have experienced issues with this same faulty part, which is expensive to fix.

NHTSA complaint #11744259 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

While driving, the Forward Collision Warning system activated unexpectedly without any apparent hazard or obstruction in front of my vehicle. Immediately after the warning appeared, the vehicle suddenly lost speed and became very slow to accelerate. I was unable to safely increase my speed while traveling on a busy roadway, creating a dangerous situation and nearly resulting in a collision with surrounding traffic. Due to the sudden loss of power and inability to accelerate normally, I activated my hazard lights and was forced to pull onto the shoulder of the road for my safety and the safety of other drivers. There were no visible obstacles, vehicles, or road conditions that appeared to justify the activation of the Forward Collision Warning system. This unexpected activation and resulting loss of vehicle performance created a significant safety risk. I am submitting this complaint because a malfunction of the Forward Collision Warning system or related vehicle systems could potentially lead to a serious accident or injury. I have experienced recurring brake issues despite recently having the brakes replaced. The problem continues to occur, raising concerns that there may be an underlying electrical or electronic malfunction affecting vehicle performance. I was recently pulled over shortly after the brake replacement due to concerns regarding the vehicle's braking system. Because the issue persists after repairs, I am concerned about the safety of the vehicle and the potential risk of a crash or loss of control.

NHTSA complaint #11741432 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

I am reporting a serious and ongoing safety issue involving my 2023 Kia Forte GT. The vehicle has experienced persistent mechanical problems, including a check engine light and multiple diagnostic trouble codes, including P0420 (catalyst system efficiency below threshold – Bank 1), P0300 (random/multiple cylinder misfire), P0304 (cylinder 4 misfire), and P0301 (cylinder 1 misfire). These codes have appeared as stored, pending, and permanent, indicating ongoing and unresolved engine and emissions system issues. In addition to these mechanical problems, the vehicle is emitting strong and concerning chemical fumes into the cabin during operation. These fumes are noticeable while driving and create a hazardous environment for occupants, raising concerns of toxic exposure and making the vehicle unsafe to operate. The vehicle also exhibits drivability issues, including jerking and performance irregularities when accelerating. Despite multiple attempts to have the vehicle diagnosed and repaired under warranty at authorized Kia dealerships, including All Star Kia East and All Star Kia Seigen Lane, the dealerships have refused to properly diagnose or repair the vehicle. I have been informed that my vehicle or account is “flagged in all systems,” and service has been denied on that basis. The refusal to address an emissions-related defect, combined with active misfires and the presence of chemical fumes entering the cabin, presents a serious safety risk. I am requesting that this issue be investigated as a potential safety defect affecting this vehicle.

NHTSA complaint #11727865 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

I have currently been avoiding driving my car because it goes in limp mode when I’m stopped at red lights I smell oil burning sometimes ive seen small amounts of smoke coming from the engine as well as just receiving an oil change less than a month ago and it already being bad , I checked the mail the other day and i received a recall letter from Kia stating my car needs to be serviced and that I can take it in for a free engine test and inspection free of cost as well as a system update free of cost , I schedule an appointment today for 11 I was told it will take half a day I receive a text to pick it back up 1 hour later I ask if an engine test was also done i received no response so I came in and was told that I would have to pay 270 for a diagnosis despite the engine inspection being different they refused to do one stating the previous owners warranty is up so the system update was done without any inspection or test to see if the damage was already which it is based off the state of my car , when trying to leave my car was not starting up and when it finally did it went into limp mode completely and wouldn’t drive at that point I reach out to Kia costumer care center and they let me know that I should have gotten a inspection free of charge along side the update and to go somewhere else online also states regardless of warranty all recalls must be addressed if problems persist regardless of past service or owner , they also cleared my recall and listed it as repaired and it was not Kia corporate shows it is still an open recall as well . I also received a Kia multi point inspection that was not at all fully performed it is 1/4 fill out .

NHTSA complaint #11720848 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

Engine would run fast and then sound like was going to stop and then it would start shaking and rumbling while driving on highway and in town. Car would stall while at a stop. Gas smells inside the car. Did not feel safe driving. Had the car towed to an independent garage on February 7th and They did an oil change, change 2 Sensors, changed all the spark plugs and changed all 4 Cylinders and on the way home from Starks garage the car was doing the same as before going to the garage with gas smells inside the car, shaking, rumbling and stalling of the engine. And the car wanting to stall while on the highway speed limit of going 60 mph. the next morning My mom and stepdad had the car towed again to another mechanic close to them at Hudson Import Automotive -Napa Auto Care and they emailed a list of problems after inspecting the car. Attaching the list of codes from a diagnostic test from Auto Zone Store # 00791 , and the Estimate for Service from Hudson Import Automotive - Napa Auto Care. Have no paperwork from Starks mechanic shop.

NHTSA complaint #11718356 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

Car goes into limp mode or cuts power when trying to accelerate. Refuses to shift or will shift down and revs highers rpms then necessary, especially at any incline. Started around 70k miles and got worse when brought in for other recalls.

NHTSA complaint #11716424 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

The vehicle began experiencing persistent engine misfires and rough running. Fuel contamination was found in the engine oil, and the spark plugs were fouled with oil and fuel. The catalytic converter has become clogged and failed multiple times due to excess fuel and oil entering the exhaust system. The Kia dealership documented these conditions but refused to perform recall-related engine repairs. Kia Consumer Affairs stated the vehicle does not meet warranty extension guidelines and would not repair the engine. Due to fuel in the oil, misfires, overheating exhaust components, and repeated catalytic converter failure, the vehicle is unsafe to drive and presents a potential fire risk.

NHTSA complaint #11706002 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

About September 6th I was driving my vehicle. It is a blue Kia forte 2017. I just had cleaned it at a local car wash. Prior to this 1-2 weeks before my ac had just started to blow hot air. So I recharged it with some recharge that I purchased a recharge can and my buddy Scott helped me put it into my low pressure air conditioning valve area. Soon after like I said when I was leaving a car wash. And I drove down to a gas station and as I start braking my car started running a lot slower. Then finally it almost halted and all the dash lights all illuminated everywhere. And I had to turn the wheel super slow as I approached the left turn into the gas station. And then I noticed my car had shut off completely. I screamed to the men that were at a gas pump feet away to help me push the car into the station. They finally ran over and pushed it into the station. Soon after we attempted with one car, and one truck we tried to jump start my car with the batteries. It didn’t start or turn the engine over fully either few times we attempted jumping it. I finally called it quits and took a ride home. The next day my buddy tried to “ fix it “ he said it didn’t really work as properly and the battery isn’t probably the problem. He said it might be the ac compressor due to my air going out weeks before. But he was afraid to tell me it wasn’t gonna be a cheap or easy fix. He suggested I go to a mechanic. Months prior I received a few notices in the mail that stated my name and my vehicle info. I never really paid them any mind until now but I am thinking I should open them soon. I’m assuming that this info would be in there about a recall. I hope that this will be a substantial amount of evidence for my recall. The websites I reviewed and researched say the there’s a lawsuit and recalls involving my Kia forte 2017 as well. But the vin didn’t match it up fully? So I’m not completely sure why. But I am sure it only had 96k miles. Which was below the Kia 100k mile warranty too? Thanks

NHTSA complaint #11690694 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

While the vehicle was approximately ten months old with approximately 11K miles, it was continuously not functioning properly and would not start/accelerate. My 2024 KIA Forte, which was purchased new from a KIA dealership, has continuously failed to function properly. It had a water pump replaced after failing to be operated for more than a week and has since continued to fail - this time for not starting at all, not accelerating properly, and losing all power while driving (switching off completely) on at least two separate occasions. The dealership stated that I should drive the vehicle and document it when it occurs again (video) to assist them with identifying the issue since they are unable to correct the malfunction. It has been at the dealership for more than a month with no definitive resolution concerning the safety of the vehicle. I refuse to drive the vehicle and am afraid that I may injured/killed in an accident due to the safety concerns aforementioned. As of today's date, 09/22/2025, my 2024 KIA Forte remains at the KIA dealership with no foreseeable actions that may lead to a safe resolution. Further: 1) Component or system failed/malfunctioned - Engine, fuel pump, water pump. 2) Is it available for inspection - Yes. 3) How was your safety or that of others put at risk - Vehicle switched off multiple times while operating in traffic and barely escaping accidents. Suffered a scrape on the passenger's door as vehicle would not accelerate and stalled in a separate incident. 4) Vehicle or component been inspected by manufacturer - Yes, at the KIA dealership again. 5) Were there any warning lamps, messages, or other symptoms of the problem prior to the failure - No, there were no prior warning lamps, messages, or symptoms. KIA dealership stated that the 2024 KIA Forte has been "reprogrammed", but the dealership has been unable to identify the safety issues it has. I do not feel safe to operate this vehicle nor have any family members operate it.

NHTSA complaint #11688947 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

The lane assist malfunction and periodically jerks. Very unsafe I no longer use this feature . To keep control of the vehicle. I never got it inspected. As the lane assist was in use and it would jerk it would alert me of a lane departure . I mention this to include every known problem I have experienced with the vehicle. The problem That brought me here. Is my engine light came on today. Leading up to this. I have had oil leaks since I've owned the car. Im adding oil in between oil changes due to it being low. In the beginning it was a hint of smell of gas in the oil. I was informed to do more frequent oil changes. Over time the smell of gas grew stronger . No Indication to a problem then. Now the smell of gas is prominent in the oil. When the dip stick is checked its always needing more oil and smells of gas and has blackness like burning in the oil. Now there's a check engine light on. And everything I looked up says to discontinue driving the car. I am having a mechanic look at it with a code reader.

NHTSA complaint #11687003 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

The fuel input is not working properly. Will not allow fuel to go into fuel tank. Risk of fuel spilling and fire hazard.

NHTSA complaint #11685206 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

I own a 2020 Kia Forte LXS with approximately 136,000 miles. The check engine light came on with code P0420 (“catalyst system efficiency below threshold”), and an Express Oil Change & Tire Engineers location confirmed the catalytic converter is failing. The back pressure was measured and is within spec but slightly elevated, showing the part is deteriorating. I was also told my O2 sensors are burned due to the failing catalytic converter. This failure affects drivability and safety: the vehicle sometimes struggles on acceleration and hills, and I feel vibrations through the gas pedal. Because I commute 50 miles each way to work on the interstate, sudden loss of power would put me at risk in high-speed traffic. I have learned Kia and Hyundai vehicles from other years/models (including the Forte) have had recalls and extended warranties for premature catalytic converter failure and excessive oil consumption, but Kia has not yet extended coverage to the 2020 Forte. This appears to be the same issue. The vehicle has been inspected by Express Oil Change & Tire Engineers, and the quoted cost for replacement is $3,000–$3,600. This should be investigated for potential recall or warranty extension to include the 2020 model year.

NHTSA complaint #11682254 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

There is high oil consumption in my catalytic converter due to a failed oil pump or piston ring. I've just got this car in march haven't even put 10,000 miles on it. Kept up with maintenance oil changes. And currently undrivable.

NHTSA complaint #11675777 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

I purchased a 2017 Kia Forte from a used car dealer. Two weeks after I picked up the car, the car stalled at intersections. I checked it out at a Midas and they found that oil was not getting to the engine and it needed a new engine. I towed it back to the dealer because it was within the Lemon law, under 75,000 miles. He said he fixed it, and replaced the engine, but after I picked it up, the same thing happened. I towed it back again and printed a list of mechanical things to check that was online. The second time, he said they cleaned the engine. I am concerned that there is a serious problem with the car and it is not safe to drive. I would have to restart the car and it would stall again. I have not picked up the car a third time again.

NHTSA complaint #11645177 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

This car was sold to me without disclosing that the manufacture failed to have a engine security system on the car to at least "deter" auto theft.If the key to the car was programmed/chipped like other cars, it would provide at least some level of protection. I've already stopped car thieves from trying to steal it once by pure luck, but I'm like the thousands out there constantly worried that someone's going to try to take it in lieu of the social media challenges.The horrible settlement that out government gave us was to upgrade the software which provides NO help with deterring thieves from breaking in and trying to steal it.The reimbursement provided in the settlement is complete joke, and doesn't offer to properly repair or reimburse for after-market security systems.This is evident from the fact that insurance companies still won't insure this car, even after the software upgrade. The insurance companies are telling me that they still won't insure the car even with upgrade because it doesn't stop thieves from breaking into the car and causing comprehensive damage to the car.I can only find a few insurance companies that will insure the car, and the premium cost is twice as much as I pay to insure a car that's worth twice as much money! If our government or NHTSA was truly concerned, they would have demanded that the manufacture make significant change to the ignition/engine starter, i.e., changing out the ignition switch system with a programmed/chipped key, and/or engine starter kill without said key. If the manufacture and the government made this change a required "recall" to properly fix and advertised it nationwide, THEN thieves would at least be less inclined to cause damage, and insurance companies would feel more comfortable about taking the risk. This ongoing expense/problem for me has me seriously considering if anyone in my family should every purchase another KIA/Hyundai product again. Stand behind your product with some INTEGRITY.

NHTSA complaint #11626477 — an unverified report by a vehicle owner.