There are 3 owner-reported engine complaints for the 2020 Kia Sedonain NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
Check engine light came on all of a sudden. Smell of exhaust/gas coming from car. Took car to the dealership to get the cause of the check engine light coming on. Dealership said it came back 02 sensor bank 2 and exhaust gasket to header.
Problem: The Vehicle Slows down all of a sudden on the middle of the road from around 70 miles to 10 miles, then slowly drives at 15 or 20 miles speed. Safety Concern: On the Interstate Hwy, this has happened many time. Fortunately without any accidents. Very recently also this happened and I do not drive the vehicle out now, since it does not accelerate. Reason: The failure of the accelerator Pedal. Symptoms: The "Check Engine" light comes one and the Engine abruptly slows down. First time it occurred: I a year after the Vehicle was bought -- 15000 miles -- Company did a Warranty replacement after almost a month (Multiple Visits). Second time it occurred: After 4 years-- 50000 miles -- company did a Warranty Replacement after a month (Multiple visits). Third time it is occurring: After 5 years -- 63000 miles -- Company claims it is no longer a warranty issue and also it is a different problem that is causing the same issue and charging me $5000 for repairs. Present Situation: The Vehicle is unusable and since it is the 3rd time this is happening, there is a serious issue with the Vehicle and I am worried about my/my families Safety. A replacement of the Vehicle with the fully tested one (With no such safety issues)and with guarantee that the Company/Its dealers will service the vehicle without delay will be helpful. Available details: All the correspondence from the first time this issue happened (complete correspondence with the company of my safety and replacement of the vehicle) is available. Also my Service records with the Dealerships and the warranty issues are also available. The False charges by the dealers is also available. The recent visit to another authorized Car shop and their report that this issue is the same old Accelerator pedal issue is also available.
The contact owns a 2020 Kia Sedona. The contact stated while attempting to start the vehicle in hot temperatures, the vehicle failed to start immediately. After several attempts, the vehicle was able to be started and seemed to return to normal functionality. The contact stated that the failure had become a regular occurrence during the summer months. No warning lights were illuminated. The vehicle was not taken to the dealer or an independent mechanic. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 22,000.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 26, 2026