2018 Kia Optima: stuck in gear or won't shift

Filed Aug 20, 2026 · Engine · 136,000 miles · GA

The contact owns a 2018 Kia Optima. The contact stated that while driving at an undisclosed speed, the vehicle failed to accelerate and failed to exceed 52 MPH. The vehicle shut off. The contact stated that the engine was running rough while stationary and the vehicle shut off without warning. The vehicle was taken to an Auto Parts Store, where it was diagnosed, and it was determined that the vehicle was in LIMP Mode with knock sensor codes displayed. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 136,000.

Filed Aug 3, 2025 · Engine · CA

My 2018 Kia Optima went into limp mode while exiting the freeway. I had it scanned and received a P1326 code, which is directly tied to the known engine knock sensor / bearing wear issue in Kia models. The engine light came on and the car lost power suddenly. This created a very unsafe situation. I contacted Kia, and they confirmed that my VIN is not included in the engine recall (KSDS campaign), even though my symptoms exactly match the covered vehicles. I am now stuck with an undriveable car and no recall coverage, even though I’m facing the same failure risk. I believe this VIN should be included, and that this is a clear safety issue. I am requesting the federal safety agency to investigate and push Kia to expand coverage to include more affected vehicles.

Filed Dec 20, 2024 · Engine · 106,000 miles · CA

The contact owns a 2018 Kia Optima. The contact stated that while his daughter was driving at an undisclosed speed, the check engine warning light illuminated, and the vehicle went into LIMP Mode. The vehicle was towed to an independent mechanic, who related the failure to the federal safety agency Campaign Number: 17V224000 (Engine and Engine Cooling); however, the VIN was not included in the recall. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 106,000.

Filed Nov 26, 2024 · Engine · 111,000 miles · MI

The contact owns a 2018 Kia Optima. The contact stated that while his wife was driving at an undisclosed speed, the vehicle went into LIMP Mode, and the check engine warning light was illuminated. The vehicle was restarted; however, the failure recurred while driving. The vehicle was taken to the dealer, where it was diagnosed and determined that the spark plugs had failed and needed to be replaced. The vehicle was repaired; however, the failure recurred while driving. The vehicle was towed to the dealer, where it was diagnosed that the engine had failed and needed to be replaced. The contact was informed by the dealer that the repair could not be covered due to the poor maintenance of the vehicle; however, upon providing all the maintenance records, the dealer informed the contact that the vehicle could not be repaired unless the engine had fully seized. The dealer offered a trade-in offer; however, the contact declined the offer. The vehicle was not repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 111,000.

Filed Sep 14, 2022 · Engine · 62,709 miles · TX

The contact owns a 2018 Kia Optima. The contact stated while driving 60 MPH, the vehicle went into Limp Mode. The check engine warning light illuminated. The vehicle was taken to the dealer where the failure was diagnosed as a faulty knock sensor that needed a software update. The vehicle was repaired. The contact stated that after receiving the vehicle from the dealer the vehicle was slow to accelerate and the vehicle was driving sluggishly. The contact stated that the vehicle needed to be taken back to the dealer to be diagnosed and repaired. The contact related the failure to the Kia Consent Order with the federal safety agency; however, the 2018 Kia Optima was not included. The contact stated that the remedy was not sufficient to remedy the vehicle failure. The manufacturer was notified and a case was opened. The failure mileage was 62,709.

Filed Aug 8, 2022 · Engine · 99,000 miles · GA

The contact owns a 2018 Kia Optima. The contact stated that while her fiancé was driving at a slow speed, the vehicle inadvertently shifted into LIMP mode with the check engine warning light illuminated. The vehicle was taken to an independent mechanic where it was diagnosed and DTC: P1326 (KSDS) was retrieved. The contact was informed that there was vibration caused by excessive connecting rod bearing wear. The dealer was not notified of the failure. The manufacturer was notified of the failure and confirmed that the VIN was not under recall for the failure. The approximate failure mileage was 99,000.

Filed Jul 13, 2021 · Engine · NY

Back in September of 2020, my car randomly went to limp mode while driving at highway speeds. Had the car towed to the dealer. Dealer advised of apparent “software issue” to correct the problem. Well this happened two more times after that twice the software was updated which didn’t work. The third time the replaced the knock sensor and so far I haven’t went to limp mode, however, the car has not drove the same and seems to get worse each passing day. Rough shifting, engine vibrates more than usual. Car struggles at times to go up hills, when giving gas a though way speed the car has a few second delay. Sometimes it feels as if the transmission is skipping. The car is up to date on all recommended services, I.e transmission flush and fill etc. There are also times when the vehicle is started but struggles. Almost as if it want to loose power but it doesn’t. Has happened numerous times however recently it actually didn’t start. Struggle to turn over a couple time but then finally did. A check engine light came on but then went away the next day after driving. I have an appointment with the dealer this week to look at this and other issues, again, hoping for some progress at that point.

Filed Aug 5, 2019 · Engine · 14,900 miles · IL

On 03/29/2019 was traveling to work. On interstate 53 southbound car went to limp mode. No power. Managed to get to dealership. They tried to repair my vehicle for 1 month after they told me that engine need to be replaced they managed to change wiring harness. After 1 month it was done. I took car back. 1 or 2 weeks later car went into limp mode again with same problem. Filed a claim with kia and bbb to resolve it. As of right now they had in inspections on my vehicle as they stated from kia california hq and from korea hq with no luck to repair it. As manager told me they dont have any ideas how to fix it. Want kia to buyback my vehicle and let me get away from this lease with reimbursement on payments because car not in my posession for 128 days and counting. They switched me 3 loners.