P0420 on HYUNDAI ACCENT
What P0420 Means on Your HYUNDAI ACCENT
Real HYUNDAI ACCENT Owner Reports (Source: NHTSA Complaints Database)
"The engine light is blinking on the dashboard and making too much sound from the engine, took the car to mechanic he said problem with o2 sensors and catalyst system effieciency (p0420) code"
"2016 Hyundai Accent only has approximately 132,000 miles and needs a new engine. Three different mechanic shops (one being a Hyundai dealership) looked at the vehicle and determined that it needed a new engine due to engine knock in lower end of engine."
Data from NHTSA Vehicle Complaints Database. All reports are filed by vehicle owners directly with the U.S. Department of Transportation.
Common Causes of P0420 on HYUNDAI ACCENT
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.