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Service bulletin A23-042

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10237807
Published by NHTSA2023-06-15
Manufacturer's numberA23-042
Manufacturer's date2023-06-02
NHTSA componentELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING

NHTSA's summary

Service Bulletin - A combination of carbon deposits on the intake valves and the PGM-FI software settings may lead to reduced combustion stability under certain circumstances. This results in a misfire being detected and DTC stored.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Engine, Software

Vehicles listed
HONDA FIT2018, 2019

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
A21-0072022-07-07. Service bulletin. Service bulletin - The MIL comes on with DTC P0300 (random misfire detected) or P0301–P0304 (cylinder misfire detected). Carbon buildup on the intake valves may be affecting combustion.