P0420 on HONDA ACCORD
What P0420 Means on Your HONDA ACCORD
Real HONDA ACCORD Owner Reports (Source: NHTSA Complaints Database)
"I just bought the car and had it 1 week and i was driving to work when the check engine light came on suddenly and car started misfiring. this happened right when i was stopped at a light and turned on my a/c. 3 codes came on which were p0420, p0139, and p2647."
"In 2008, i purchase a new honda accord v6 paid with financing $25,000. i purchase a brand new vehicle to not have to be bothered with someone else problems. when my car reached 100 thousand miles in the winter, i heard a loud knocking sound under the hood and i was loosing a lot of oil."
"My 2010 honda accord has had a check engine light for a p0420 code at 110k miles. for someone that knows something about cars, a catalytic converter should not be going out this soon."
"After service at honda service station at rosenberg, tx... i had issues with the temperature sensor in the front of the grill, also a code showed up 2 days later, along with check engine light... when scanned it was "p0420"..."
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 HONDA ACCORD
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.