P0304 on KIA SOUL
What P0304 Means on Your KIA SOUL
Real KIA SOUL Owner Reports (Source: NHTSA Complaints Database)
"I was driving home from work. vehicle started normal in parking lot. once on road i started to go up a hill. vehicle started losing power. obdii reader stated p0304 cylinder 4 misfire detected and p0420 catalyst system efficiency below threshold (bank 1)."
"While driving, the vehicle suffered a sudden and total engine seizure and loss of power (stalling), creating a life-threatening hazard in traffic . A certified Kia technician diagnosed a seized short block, multi-cylinder misfires (P0300-P0304), and a hole in the exhaust valve."
"The contact owns a 2020 Kia Soul. The contact stated that while driving at an undisclosed speed, the vehicle failed to accelerate as needed. Additionally, the engine was leaking oil. The check engine warning light was illuminated."
Data from NHTSA Vehicle Complaints Database. All reports are filed by vehicle owners directly with the U.S. Department of Transportation.
Common Causes of P0304 on KIA SOUL
Percentages based on NHTSA complaint component analysis for this vehicle.
Complaint Trend by Year
What To Do Next
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1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if your vehicle is covered.
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2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50-$150) pinpoints the root cause before you spend money on parts.
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3
Compare repair quotes
Get 2-3 quotes. Dealer vs independent shop prices often differ 30-50% for the same repair.