2020 Kia Soul transmission problems

Filed Oct 4, 2026 · Engine, Transmission · ME

The vehicle experienced complete and sudden engine failure while actively driving on a roadway. The engine began making loud, violent knocking noises, the check engine light illuminated, and the vehicle completely stopped and lost all motive power mid-drive. I believe this is directly caused by the defective piston oil rings covered under the federal safety agency Safety Recall Campaign 21V‑259 (Kia Campaign SC209). The vehicle had only just begun exhibiting these severe symptoms on the exact day it stopped working. The loud engine knocking, immediate check engine light, and rapid internal oil loss all occurred rapidly within hours of each other on the same day, leading directly to the total mechanical failure and seizure. The engine component is currently intact and remains completely available for physical inspection upon request. The engine in my Kia Soul is the 2.0L Nu MPI. The vehicle was towed to an authorized Kia dealership service center. The dealership confirmed that the engine has completely failed and had loud knocking sounds, but they are attributing the issue to an external leak in an attempt to deny coverage under Safety Recall SC209. The manufacturer (via the dealership, Techline, and Kia Corporate) has inspected the vehicle, but they have refused to perform the required internal engine teardown to inspect the piston rings or to honor the federally mandated recall remedy and fix my engine for free despite the recall. I have been fighting this for over two weeks now. I also provided my regular oil change documentation to show there was zero owner neglect.

Filed Oct 3, 2026 · Engine, Transmission · LA

Vehicle Details: 2020 Kia Soul, 2.0L Nu MPI Engine Complaint Description: My vehicle is experiencing severe, excessive engine oil consumption at 99,000 miles, which has directly resulted in a P0420 diagnostic trouble code (Catalyst System Efficiency Below Threshold) due to motor oil poisoning the catalytic converter. This vehicle exhibits the exact failure mechanism, symptoms, and manufacturing defects detailed in Kia Safety Recalls SC209 and SC336 (improperly heat-treated or defective piston oil rings). However, when checking my 17-digit VIN on the Kia portal, I am informed that my vehicle is excluded from these recall campaigns. The heavy oil consumption creates a severe safety hazard. The engine rapidly drops below safe oil operating levels between scheduled maintenance intervals without illuminating an oil level warning light, putting the vehicle at high risk for sudden engine stall, total engine seizure, or an engine compartment fire while traveling at highway speeds. Because this is a known, documented manufacturing defect for this specific model year and engine type, Kia should expand Safety Recall SC209 to include my VIN and prevent a catastrophic highway failure.

Filed Sep 4, 2026 · Electrical, Engine · NY

The vehicle has experienced intermittent stalling and near-stalling while driving. The problem began after a prior Kia engine replacement related to DTC P1327/P132700. After the engine replacement, the vehicle developed additional drivability and warning-light concerns, including P0420 and communication/CAN faults. An authorized Kia dealer later documented that the vehicle had stalled a few times, identified P0420, reported a clogged catalytic converter, and found 11 additional lost-communication/CAN-related codes. The dealer stated that approximately eight additional diagnostic labor hours would be required to investigate the remaining faults. The vehicle was returned with the intermittent stalling condition unresolved. The stalling presents a safety risk because the vehicle can lose motive power unexpectedly while being driven. The vehicle remains available for inspection. The dealer confirmed the stalling complaint and performed diagnostic testing, but the complete cause has not been determined. Kia previously performed an engine replacement related to the earlier P1327 condition, and the current stalling occurred afterward.

Filed Jul 21, 2026 · Engine, Transmission · 34,000 miles · NC

The contact owns a 2020 Kia Soul. The contact stated that while driving at an undisclosed speed, the vehicle stalled without warning while releasing the accelerator pedal. The vehicle restarted after each failure. The first dealer diagnosed the vehicle and retrieved DTC: P04100 (Camshaft Position Sensor A Circuit); however, the repair failed to fix the vehicle. The vehicle was taken to Hendrick Kia of Concord (7550 Hendrick Auto Plaza NW, Concord, NC 28027); and the technicians informed the contact that the vehicle was not properly repaired. The vehicle was returned to the first dealer, and the dealer failed to duplicate the failure. The dealer dismissed the contact’s concern that the vehicle was consuming an excessive amount of engine oil. The contact was informed that adding one quart of oil per 1,000 miles was within normal operation of the vehicle. Upon investigation, the contact related the failure to Kia recall SC199. The manufacturer was notified of the failure and provided a case number and referred the contact to the federal safety agency Hotline to report the failure. The vehicle was not repaired. The failure mileage was approximately 34,000.

Filed Jun 30, 2026 · Transmission · PA

While driving on the interstate at approximately 70 MPH, the vehicle suffered a sudden and complete loss of forward motive power. The engine revved, but the vehicle completely ceased forward acceleration and could not maintain highway speeds. This created an immediate safety hazard, forcing me to navigate across active lanes of highway traffic without power to reach the shoulder, narrowly avoiding a rear-end collision. Once stopped, the vehicle completely refused to engage any forward gears (Drive). However, the transmission will still engage and move backward in Reverse. This is the second time this vehicle has experienced a total transmission failure in 6 years, despite having previously had the transmission replaced at an authorized dealership under Kia Service Campaign SC199. The replacement Intelligent Variable Transmission (IVT) component has suffered an identical, catastrophic mechanical failure to the first unit. The manufacturer’s previous campaign remedy failed to permanently resolve this severe highway safety defect.

Filed Apr 20, 2026 · Electrical, Engine · MN

Engine shut off while making a turn. Took car to mechanic and he stated that the car did not display any error messages. The car also over heated while driving in freeway.

Filed Mar 6, 2026 · Electrical, Transmission · 90,924 miles · CA

The contact owns a 2020 Kia Soul. The contact stated that while driving at an undisclosed speed, the vehicle stalled. The automatic start warning light illuminated, and the engine seized. Additionally, the error message indicated that the automatic start feature was disabled; however, the contact stated that the automatic start feature was enabled. The contact stated that while attempting to start the vehicle, the vehicle failed to start. After several attempts, the vehicle started. The contact disabled the automatic start feature. The contact stated that while the vehicle was decelerating, the failure reoccurred. The vehicle was taken to the dealer; however, a diagnostic test was not performed. The contact stated that the diagnostic test was incomplete. The manufacturer was not made aware of the failure. The failure mileage was approximately 90,924.

Filed Dec 28, 2025 · Engine, Fuel system · CA

The problems with the KIa Sol began with the "check engine" light continuously coming on in January of 2025. Took it to the dealership twice and numerous repairs were made and the vehicle continues to malfunction. It sputters and has created a dangerous condition to drive. For example, my 21 year old son was on the freeway and the car started sputtering. Thank God that the truck behind him moved lanes when he saw the car was struggling or it could have ended tragically. That was incredibly scary. I took it to the dealership again. They kept for two weeks trying to find the root of the problem, I spent $4,000 to "fix" it. When I drove it around town it did the same again, which put my brother and I in danger. The dealership finally said that the car needs a catalytic converter, which I was quoted as costing approximately $5000 dollars. I have spent a lot of money to try to fix this car and have been in two dangerous situations because the problem was not located. I have been trying in good faith to work with the dealership and KIA corporate to put a new catalytic converter by requesting a good will gesture.

Filed Nov 28, 2025 · Transmission · FL

Vehicle transaxle will start or feel like is slips and wont go pass 40mph on the highway and has become a safety concern. This started about a week ago and continues. No lights on dash and dealer claims they cant duplicated concern. On the way to the dealer it was doing it and when we pickup the vehicle started doin again less than a mile from dealer. They charge for diag and the car is under warranty. I went back to drop off vehicle and they are refusing to take the vehicle in. I have contacted Kia prior to the visit and will contact them next Monday.

Filed Nov 20, 2025 · Engine, Transmission · SC

The engine began to sound like it was missing or sputtering. This occurred for a short period of time, and then the sound stopped. The next day the sound started again, shortly after engine seized while driving which created a very dangerous situation. After about 10 minutes the vehicle restarted, was making a sputtering noise, and was driven a short distance into a parking lot. Still, no warning lights appeared on the dashboard, vehicle was towed to a KIA dealership. At the dealership, 4 days later, We were told that the vehicle was completely out of oil. The check engine light, nor the oil icon, came on at any time. There was no evidence of an oil leak of any kind. There has been no damage to the vehicle. The vehicle has received regular oil changes either at a dealership or at a business that supplies oil change services. The engine seizing, really with no warning, created a dangerous situation.