P0430 on the 2006 Honda Accord
The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.
Nobody has written a description of this code yet.
| Customer Letter | 2018-08-06. Service bulletin. Customer letter - In some cases, the electronic control module (ECM) misinterprets sensor inputs as a warm-up three-way catalytic converter (TWC) deterioration and turns the malfunction indicator lamp (MIL) on with diagnostic trouble code (DTC) P0420 or DTC P0430 (catalyst system efficiency below threshold) stored. |
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| Customer Letter | 2018-08-06. Service bulletin. Customer letter - In some cases, the electronic control module (ECM) misinterprets sensor inputs as a warm-up three-way catalytic converter (TWC) deterioration and turns the malfunction indicator lamp (MIL) on with diagnostic trouble code (DTC) P0420 or DTC P0430 (catalyst system efficiency below threshold) stored. |
| Customer Letter | 2018-07-30. Service bulletin. Customer letter - In some cases, the electronic control module (ECM) misinterprets sensor inputs as a warm-up three-way catalytic converter (TWC) deterioration and turns the malfunction indicator lamp (MIL) on with diagnostic trouble code (DTC) P0420 or DTC P0430 (catalyst system efficiency below threshold) stored. |
| Customer Letter | 2018-07-30. Service bulletin. Customer letter - In some cases, the electronic control module (ECM) misinterprets sensor inputs as a warm-up three-way catalytic converter (TWC) deterioration and turns the malfunction indicator lamp (MIL) on with diagnostic trouble code (DTC) P0420 or DTC P0430 (catalyst system efficiency below threshold) stored. |
| AHPa06212018901 | 2018-07-16. Service bulletin. Dealer message - Today, June 21, 2018, American Honda is announcing a Warranty Extension for 2006-07 Accord Hybrid vehicles to address the MIL illuminating with DTC P0420 or P0430. Basic Problem - The ECM may misinterpret sensor inputs as deterioration of the warm-up catalytic converter, causing the MIL to illuminate with DTC P0420 (rear bank catalyst system efficiency below threshold [bank 1]) or P0430 (front bank catalyst system efficiency below threshold [bank 2]). |
| A18-023 | 2018-07-16. Service bulletin. Service bulletin - In some cases, the ECM misinterprets sensor inputs as a warm-up three-way catalytic converter (TWC) deterioration and turns the MIL on with DTC P0420 or DTC P0430 (catalyst system efficiency below threshold) stored. There are two bulletins to address the TWC deterioration with DTC P0420 or P0430: ? 18-022, Warranty Extension: MIL Is On with DTC P0420 or P0430 (All states Except CA, CT, ME, MA, NY, and VT), for vehicles currently registered in all states except CA, CT, ME, MA, NY, and VT. The warranty on these vehicles is extended 6 months from the launch of this campaign (expires December 31, 2018) or 200,000 miles, whichever comes first. ? 18-023, Warranty Extension: MIL Is On with DTC P0420 or P0430 (CA, CT, ME, MA, NY, and VT Only), for vehicles currently registered in CA, CT, ME, MA, NY, and VT. The warranty coverage is 17 years from the original date of purchase with unlimited mileage for the first year of this warranty extension based on the launch date of this extension. After one year, the coverage changes to 17 years from the original date of purchase or 200,000 miles, whichever comes first. |
| A18-022 | 2018-07-16. Service bulletin. Service bulletin - In some cases, the ECM misinterprets sensor inputs as a warm-up three-way catalytic converter (TWC) deterioration and turns the MIL on with DTC P0420 or DTC P0430 (catalyst system efficiency below threshold) stored. There are two bulletins to address the TWC deterioration with DTC P0420 or P0430: ? 18-022, Warranty Extension: MIL Is On with DTC P0420 or P0430 (All states Except CA, CT, ME, MA, NY, and VT), for vehicles currently registered in all states except CA, CT, ME, MA, NY, and VT. The warranty on these vehicles is extended 6 months from the launch of this campaign (expires December 31, 2018) or 200,000 miles, whichever comes first. ? 18-023, Warranty Extension: MIL Is On with DTC P0420 or P0430 (CA, CT, ME, MA, NY, and VT Only), for vehicles currently registered in CA, CT, ME, MA, NY, and VT. The warranty coverage is 17 years from the original date of purchase with unlimited mileage for the first year of this warranty extension based on the launch date of this extension. After one year, the coverage changes to 17 years from the original date of purchase or 200,000 miles, whichever comes first. |
7 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.