P0430 on Honda vehicles
47 owner complaints filed with NHTSA about Honda vehicles mention P0430 (Catalyst System Efficiency Below Threshold Bank 2) - across 3 models. Below is where it shows up, by model and year.
Can you drive with it? Yes - same situation as P0420 but for the other side of a V6/V8 engine. Fix before emissions testing.
Symptoms, likely causes in order and realistic repair costs are on the main P0430 page - they do not differ much by brand. This page shows what is specific to Honda: which models and years actually report it.
Honda models reporting P0430
The number next to each year is how many NHTSA complaints for that car mention P0430. Owners rarely quote trouble codes when complaining, so real occurrence is many times higher - use these numbers to compare years, not as totals.
What Honda owners report
“2019 Honda pilot with under 60k miles, no obvious symptoms but Codes P219B and P0430 coming up, multiple sites reporting common recall for fuel injector issue with these codes. Called dealer and reporting that VIN not covered even though codes/symptoms the same as other vehicles covered under recall. Estimated cost over $1000 to replace fuel injectors”2019 Honda Pilot · Jun 2026
“The malfunction indictator light came on due to diagnostic trouble code P0430 (front bank catalyst system efficiency below threshold [bank 2]) while driving. The vehicle has 64,240 miles and has had zero symptoms prior to the DTC appearing. This problem is noted in Service Bulletin 21-010 for Honda Pilots year 2017-2019, but my Vin was not included in the "Vin range". I am taking the vehicle in to the dealer for an inspection and diagnostic, but I believe the "Vin range" should be updated to include my vehicle.”2019 Honda Pilot · Apr 2026
“Currently showing DTC P219B (O2 Sensor Signal Biased/Stuck Lean - Bank 2 Sensor 1) along with P0430 . For prior years thru 2019, Honda has issued Service Bulletins 19-072 and 20-100 covering DTCs P030x, P219A, and P219B, which may involve PCM software updates, a Cylinder A/F Test, and potential injector replacement. However, they have not issued bulletins for 2020. My car only has 58,000 miles.”2020 Honda Pilot · Feb 2026
“Fuel Injector issue - diagnosed at Mike's Automotive, a NAPA AutoCare Center by ASE certified technician. Codes were P0430 and P219B which indicates fuel injector issue. The Emmissions System Problem check engine light goes on and off at random times, reduced fuel economy by almost 5 mpg, hard shifting, stalling. All symptoms are in line with the recall for 2019 Honda Pilots however my VIN is not included in the recall, but I believe it should be. Honda wants me to bring my vehicle to a Honda Dealership to get diagnosed, diagnostic is my cost, though I've already paid for a diagnostic at a different repair shop.”2019 Honda Pilot · Nov 2025
Counts are NHTSA owner complaints whose text mentions P0430 - owner-reported and unverified. Always confirm with a diagnosis of your specific vehicle.