P0430 — Catalyst system efficiency below threshold (bank 2).

Code P0430 is a standard OBD-II diagnostic trouble code: Catalyst system efficiency below threshold (bank 2).

In ProblemsByVin's analysis of the NHTSA owner-complaint record, owners cite P0430 across 35 vehicle failure patterns. Diagnostic codes in complaints are reported by owners and are unverified — they point to where this code shows up, not a confirmed diagnosis. Open a page below for the full pattern (symptoms, mileage, repair costs owners cite).

Vehicles where owners report P0430 35 patterns

2021 Ford Explorer

engine — Misfire and catalytic converter failure (related)

2020 Ford F-150

powertrain — 10R80 transmission abrupt downshifts and loss of power

2020 Honda Pilot

engine — Power Loss/Hesitation During Acceleration

2020 Hyundai Palisade

engine — Engine stalling during normal operation without warning lights

2019 Ford Expedition

powertrain — Hard Shifting, Jerking, and Transmission Adaptation Issues

2019 Honda Odyssey

engine — Fuel Injector Failure

2019 Honda Odyssey

fuel system — Loss of motive power and acceleration hesitation

2019 Honda Pilot

electrical — Infotainment/Display System Failures

2019 Volkswagen Atlas

engine — Engine stalling / loss of power while driving

2018 Acura MDX

engine — Connecting-rod bearing premature wear and seizing

2018 Ford Explorer

engine — Coolant intrusion into cylinders and oil

2018 Ford F-150

powertrain — Catalytic converter failure; possible misdiagnosis or premature failure

2017 Honda Pilot

engine — Engine Misfire and Emissions System Issues

2016 Acura MDX

powertrain — Engine rod bearing failure (connecting rod bearing seizure)

2016 Dodge Charger

electrical — Ignition coil failure

2016 Honda Pilot

engine — Connecting Rod Bearing Failure / Internal Engine Damage

2015 Jeep Compass

engine — Engine stall with catalytic converter-related codes

2014 Dodge Durango

engine — Engine Stalling Without Warning

2014 Kia Soul

engine — Catalytic Converter Damage (Secondary to Engine Issues)

2013 Nissan Altima

engine — Catalytic converter rupture and internal spillage

2012 GMC Acadia

powertrain — Transmission shuddering, hesitation, and slipping

2012 INFINITI QX56

engine — Catalytic converter failure

2011 Ford F-150

engine — Intercooler moisture ingestion causing misfire and power loss

2011 Hyundai Sonata

engine — High oil consumption with catalytic converter damage

2011 INFINITI QX56

engine — Catalytic Converter Premature Failure

2009 GMC Acadia

engine — Catalytic converter failure and emissions issues

2008 GMC Yukon

engine — Check Engine Light and Catalyst System Codes from Non-Compliant Aftermarket Converter

2007 Jeep Commander

engine — Engine stalling while driving

2007 Jeep Grand Cherokee

engine — Engine stalling—random, without warning

2006 Ford F-150

engine — Catalytic Converter Premature Failure

2006 Nissan Titan

engine — Premature Catalytic Converter Failure

2006 Nissan Xterra

engine — ECM relay failure and secondary catalytic converter damage

2006 Toyota Corolla

engine — Engine Control Module (ECM) Failure

2006 Toyota Tacoma

body — Component failures secondary to frame rust — loss of structural mounts and support

2005 Dodge Durango

powertrain — Engine Stalling at Low Speed

Codes are pulled from what owners wrote in their NHTSA filings — they're allegations, not a shop diagnosis. Always confirm with a live scan. Browse all diagnostic codes →