2020 Kia Optima Power Train

The vehicle experiences a dual-clutch transmission shudder in low gears and at low speeds. This issue causes a sudden loss of speed in situations such as merging onto a highway, leaving a parking spot, or while driving at approximately 30 mph. The shudder occurs randomly and poses a serious safety concern. The problem first appeared in 2020 when the vehicle had fewer than 5,000 miles on it. Beginning in 2024, at around 20,000 miles, the condition began escalating rapidly, with the shudder occurring more frequently and with greater severity. All incidents have been recorded on dash cam and provided to the dealership’s service department. The vehicle has been serviced multiple times for this issue and was kept at the dealership for approximately six weeks in total. Despite this, the dealer refuses to acknowledge the problem, citing the absence of warning lights. When the clutch was adjusted at my request, the issue temporarily improved but returned about three weeks later. The shudder now occurs more often and with greater severity, frequently forcing the driver to pull over for safety. This ongoing transmission defect creates unsafe driving conditions, and the lack of acknowledgement or permanent resolution by the dealer further increases the risk to the driver and others on the road.

After complaining about clutch judder resulting in getting anti-judder logic software update, followed a month later by transmission serviced, transmission suddenly failed while driving in heavy traffic on the freeway. After repairs, judder keeps happening at low speeds on the freeway or slow speeds under load.

At gas, the vehicle jumps/judders as if it’s not getting enough gas to get up and go, and then at higher speeds it goes fine. Was reported to Horne Kia while under warranty. They never found the issues. Months later issue was found by a new mechanic, now the vehicle is no longer under warranty and the TRA codes are posted online. [XXX] Reported August 2021 [XXX] Reported December 2020 INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The vehicles 7-speed dual clutch transmission (DCT), is horribly jerky at very low speeds and on take off. It has become dangerous to drive as my wife almost caused an accident from the vehicle not reacting to acceleration pedal, or from it reacting completely unexpectedly. The transmission is very jerky as you take the foot off the brake without pressing accelerator pedal, it shakes the entire vehicle. It also jerks heavily if you barely touch the gas pedal on take off. Dealership has done a software update on the transmission which only helped initially for about 2-3 weeks, after which the transmission started behaving in that way much worse. It is a constant and persistent issue, however, as there are no fault codes or check engine light is not displayed, the dealer states there is nothing they can do to fix the problem. The vehicle is under full manufacturer power train warranty, yet they refuse to fix it.

On Thursday, I was leaving to drive my son 5 miles up the road and my check engine light started flashing with no warning. My car slowed down and started jerking. I took it to auto zone (on limp mode) to receive a code and it came back with p1326. My car only has 64,216 miles and I also just recently got the oil changed. I have not taken it to a dealer yet but I wanted to report this because my car is only 2 years old and shouldn’t have engine/power train issues.