P0300 on Kia vehicles
31 owner complaints filed with NHTSA about Kia vehicles mention P0300 (Random/Multiple Cylinder Misfire Detected) - across 9 models. Below is where it shows up, by model and year.
Can you drive with it? Short trips at moderate speed are usually tolerable; a flashing check engine light means stop - raw fuel is destroying the catalytic converter.
Symptoms, likely causes in order and realistic repair costs are on the main P0300 page - they do not differ much by brand. This page shows what is specific to Kia: which models and years actually report it.
Kia models reporting P0300
The number next to each year is how many NHTSA complaints for that car mention P0300. Owners rarely quote trouble codes when complaining, so real occurrence is many times higher - use these numbers to compare years, not as totals.
What Kia owners report
“Had the software update for piston recall in April 2025, did all the testing and getting codes p0300 all the way to p0305 being that it only has 4 cylinders a 5th cylinder misfire code leads to piston ring failure, it is also burning oil the spark plugs are ashy which I have photo evidence of all of this and they are covered in oil, my car broke down while driving and lost complete engine power I am medically complex. Dealerships are denying the recall as it was "completed" due to a software update. This is a known safety hazard and I could have died. I have all proof it's the spark plugs failing.”2021 Kia Seltos · Sep 2026
P0300 on other makes
Makes with enough NHTSA reports of P0300 for their own page.
Counts are NHTSA owner complaints whose text mentions P0300 - owner-reported and unverified. Always confirm with a diagnosis of your specific vehicle.