2014 Kia Optima acceleration problems

Filed Jan 13, 2026 · Acceleration, Engine · OK

Motor blew going down the road.

Filed Dec 31, 2025 · Acceleration, Airbags · OK

Check engine light was flashing and the car wouldn’t accelerate up to speed, wouldn’t turn over when tried to start.

Filed Oct 18, 2023 · Acceleration, Engine · TX

engine was replaced per CASE # 14397135, and PI1803Y/Z, SINCE engine repair Turbocharger Boost Control Position Sensor “A” Circuit High CODES (P2562 & P2565) continuously come and go. Check engine light comes on and off for the same codes. Knocking noise continues, loss of acceleration as if voltage or gas was lost, steering wheel speed control buttons (+/-) no longer properly function since engine replacement. It now has a class 2 leak. Safety risk:when driving it loses speed or fails to accelerate may cause crash. KIA dealership has tried to access the code but Codes are spontaneous, same for loss of acceleration.

Filed Aug 9, 2022 · Acceleration, Electrical · OK

I was driving down the interstate for my work commute apx 70 mph when HEV warning light engaged and vehicle went into limp mode. Had vehicle towed to dealership after running several tests determined the engine was knocking and needed replaced. After 2 months reman engine placed in vehicle. Vehicle function apx 6 months when the exact same problem occured on the highway traveling apx 60 mph. Vehicle is still in dealership. Thankfully, both times I was able to coast to the shoulder and avoid a collision. There is something wrong with these vehicles that need to be fixed.

Filed Nov 4, 2021 · Acceleration, Engine · NC

Vehicle has engine failure at 156600mi. Bearings and axle are worn out which caused the engine to go into limp mode (code P1326). Car is accelerating poorly and does not oprate over 60mph. Vehicle required a new engine. Dutch Miller of Charlotte Kia, 7725 South Blvd, Charlotte, NC ensured that engine would be brand new. However, the engine was used, and obtained at LKQ costing $3600. Total cost for the engine and labor totalled $5117.18. Kia also confirmed the problematic suspension which led to the engine failure was fixed. Once again this obligation was not met.

Filed Sep 20, 2021 · Acceleration, Engine · MD

Failed Emissions Test for Engine light being on. Took to mechanic and he specified that it was my gas cap that needed replacing and I did so, but light is still on. No leakage was present at the time when mechanic checked, however, in the past there was a smell of gas inside the vehicle but it's no longer present at the moment.

Filed May 7, 2021 · Acceleration, Transmission · 118,000 miles · TX

Crank shaft bearing went bad causing engine to fail in vehicle and almost get hit by traffic contacted dealer and was advised that there was a recall on every model of my car except mine because it was the gas hybrid which still has the same engine and problem as the ones in recall j bought the car for around 13k and only had it for bout 3 months before this happen dealer won't repair work under recall because it does fall under the recall for millions of other because it is hybrid as well as gas ? Doesn't make any sense and I got screwed outta 13k and could have been injured as well as my 2 kids that where in the car with me

Filed Oct 25, 2020 · Acceleration, Electrical · CA

I experience a bms warning light on my hybrid vehicle indicating to stop the vehicle and do not drive. This happen on the fast lane of the 14 freeway in acton ca. I took the car to the local kia I was told it was the hybrid coolant a computer program and a hybrid drive belt replaced the computer program. The update of the program I would of not know about the issue since only dealers are aware of it. I paid over 700.00 when I picked up my car for the repairs. Drove it the next day I experience loss of power again when I was trying to cross an intersection in the city of acton. My car almost stop and the hev warning light came on. Called the dealer again and was told to bring it right away. The service advisor called me after a week and half later and told me the problem was the power relay assembly and the hybrid battery that had to be replaced. Per repair adviser, this issue is a common but for him to do the repairs I would need to pay 5800.00. He did advise to call kia corporation for possible assistance but they were no help. Since I can not afford the 5800. I picked up my car again from the dealership and paid an additional 318.00 for diagnose services. This is a known issue with kia since the service adviser told me he only had a bulletin memo of possible issues with loss of power. I asked if this warrant a recall but the answer was no since it's only a memo and the batteries are built to last only 150,000 miles I was lucky it lasted and additional 18000. Miles. I just bought this vehicle 3 years ago and now I'm sitting on a giant paper weight since I can not drive my car to avoid further damage or possibly cause an accident.

Filed Oct 13, 2020 · Acceleration, Fuel system · 72,000 miles · FL · crash · fire · 2 injuries

Tl* the contact owns a 2014 kia optima. The contact stated that while driving at 45 MPH, an abnormal odor appeared under the hood. The contact depressed the brake pedal and the vehicle accelerate forward, causing the contact to crash into another vehicle who was making a u-turn. The contact tried to gain control of the steering wheel as the vehicle went up in flames. The contact managed to crash into a ditch. The contact got out ran to the other side of the vehicle where his fianc was unconscious. The contact managed to cut the seatbelt in order to release and drag her out the vehicle. The contact went back to retrieve items but the vehicle then engulfed in flames causing an explosion. The airbags deployed. A police report was made. The fire department extinguished the flames. The contact fractured his right wrist, right ankle and sustained severe burn to his body that required medical attention. The contacts fianc who was seated in the front passenger side sustained injuries to her left legs, wrists, right foot and ankle fractured, fire burned through out her body causing her to lose her lower intestine. The contacts fianc was in a coma and in the hospital for over 90 days. There was a vehicle who made a u-turn in front prior to the vehicle catching on fire and it was informed to the contact that the driver of that vehicle died. The vehicle was deemed totaled by the insurance company. The contact mentioned that he had a recall repair performed on his vehicle 4 months prior to the failure that occurred. The contact received the federal safety agency campaign number: 20v100000 (fuel system, gasoline) april 13, 2020 which the contact believes caused the failure that occurred. The failure mileage was approximately 72,000.

Filed May 22, 2020 · Acceleration · NY · crash

2014 kia optima. Consumer writes in regards to unintended acceleration. *ld the vehicle was involved in a crash due to unintended acceleration. The vehicle struck 2 parked cars. The vehicle was repaired. The manufacturer was notified.