P0420 on HONDA ODYSSEY
What P0420 Means on Your HONDA ODYSSEY
Real HONDA ODYSSEY Owner Reports (Source: NHTSA Complaints Database)
"Strong vibration felt in passenger compartment and steering wheel when driving at 40 to 45 mph. there was a droning noise as well. this has been an issue since 2010, but identified by dealer service advisor only in feb 2014. quoted 800 dollars to replace both front engine mounts."
"Honda issued a recall on the fuel pump December 2023. They did not have any parts available to replace mine. I had brought in my Odyssey Elite to Space Coast Honda multiple times before the recall stating my engine wouldn't crank. I was unable to get the fuel pump replaced until December 5, 2024."
"While driving, the check engine light appeared and the vehicle began running rough and hesitating during acceleration."
"Life-Threatening Acceleration Lag: The vehicle is experiencing severe power loss during critical driving moments, for example, while entering intersections or attempting to re-accelerate into moving traffic."
"The contact owns a 2019 Honda Odyssey. The contact stated that the emission warning light was illuminated. The vehicle was taken to an independent mechanic, where a diagnostic scanner was used to retrieve diagnostic trouble codes P0420 and P0430."
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 ODYSSEY
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.