HONDA

Customer Letter

Manufacturer communications

Publication date: 2018-07-09
Received by NHTSA: 2018-07-30
NHTSA record numbers: 10143223 · 10143356

Multiple filings of the same bulletin are grouped here; original record numbers remain available.

Manufacturer summary

Original wording in English

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.

NHTSA manufacturer communications ↗

Reported code forms

P0420 P0430

Manufacturer wording

Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.

HondaP0430

catalyst system efficiency below threshold

NHTSA 10129824 · NHTSA 10142632 · NHTSA 10142633

Check vehicle applicability

A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.

Make	Model	Model year
Honda	ACCORD HYBRID	2007
Honda	ACCORD HYBRID	2006

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