# 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.

- Type: Service bulletin
- NHTSA id: 10237807
- Published by NHTSA: 2023\-06\-15
- Manufacturer's number: A23\-042
- Manufacturer's date: 2023\-06\-02
- NHTSA component: ELECTRICAL 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

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10237807-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10237807-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system, Engine, Software

## Vehicles listed

- 2018 to 2019 HONDA FIT

## Other bulletins for the same vehicles and component

- [A21\-007](/bulletins/10215233.md), 2022-07-07, Service bulletin: FUEL SYSTEM, GASOLINE; FUEL SYSTEM, GASOLINE:STORAGE:EVAPORATIVE EMISSIONS:HOSES/VALVES/SENSORS; ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING; ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION:SEALS/GASKETS. 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.

JSON: [/v1/bulletins/10237807](/v1/bulletins/10237807)

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