# Service bulletin ONL6M208142023

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: 10240777
- Published by NHTSA: 2023\-08\-18
- Manufacturer's number: ONL6M208142023
- Manufacturer's date: 2023\-08\-14
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

Owner Notification Letter \- On some 2018\-2019 Fit vehicles, 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 Malfunction Indicator Lamp \(MIL\) being illuminated.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10240777-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10240777-9999.pdf)

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

## Components

Engine

## Vehicles listed

- 2018 to 2019 HONDA FIT

## Other bulletins for the same vehicles and component

- [ATI\&05032024905](/bulletins/11000132.md), 2024-05-15, Other: ENGINE. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2018 Fits with customer complaint of Check Engine Light \(CEL\) on with DTC P0420 \[Catalyst System Efficiency Below Threshold\] stored. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to your attempting a repair of any kind.
- [ATI\&04152024902](/bulletins/10253302.md), 2024-04-17, Service bulletin: ENGINE AND ENGINE COOLING. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2018 Fits with customer complaint of Check Engine Light \(CEL\) on with DTC P0420 \[Catalyst System Efficiency Below Threshold\] stored. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to your attempting a repair of any kind.
- [ATI\&03282024902](/bulletins/10252468.md), 2024-04-02, Service bulletin: ENGINE AND ENGINE COOLING. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2018 Fits with customer complaint of Check Engine Light \(CEL\) on with DTC P0420 \[Catalyst System Efficiency Below Threshold\] stored. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to your attempting a repair of any kind.
- [ATI\&02152024905](/bulletins/10250729.md), 2024-02-27, Service bulletin: ENGINE AND ENGINE COOLING. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2017\-2018 Fits with customer complaint of Check Engine Light \(CEL\) on with DTC P0420 \(Catalyst System Efficiency Below Threshold\) stored. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to your attempting a repair of any kind.
- [ATI\&02012024904](/bulletins/10250329.md), 2024-02-15, Service bulletin: ENGINE AND ENGINE COOLING; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2017\-2018 Fits with customer complaint of Check Engine Light \(CEL\) on with DTC P0420 \(Catalyst System Efficiency Below Threshold\) stored. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to your attempting a repair of any kind.
- [ATI\&01172024905](/bulletins/10249201.md), 2024-01-26, Service bulletin: ENGINE AND ENGINE COOLING. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2017\-2018 Fits with customer complaint of Check Engine Light \(CEL\) on with DTC P0420 \(Catalyst System Efficiency Below Threshold\) stored. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to your attempting a repair of any kind.
- [ATI\&01022024909](/bulletins/10248678.md), 2024-01-09, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR; ENGINE AND ENGINE COOLING. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2017\-2018 Fits with customer complaint of Check Engine Light \(CEL\) on with DTC P0420 \(Catalyst System Efficiency Below Threshold\) stored. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to your attempting a repair of any kind.
- [ATI\&11282023910](/bulletins/10246405.md), 2023-12-08, Service bulletin: ENGINE AND ENGINE COOLING. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2017\-2018 Fits with customer complaint of Check Engine Light \(CEL\) on with DTC P0420 \(Catalyst System Efficiency Below Threshold\) stored. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to your attempting a repair of any kind.
- [A23\-042](/bulletins/10237807.md), 2023-06-15, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING. 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.
- [A21\-007](/bulletins/10237806.md), 2023-06-15, Service bulletin: ENGINE AND ENGINE COOLING. Service Bulletin \- The MIL comes on with DTC P0300 \(random misfire detected\) or P0301–P0304 \(cylinder misfire detected\) due to carbon buildup on the intake valves may be affecting combustion.

JSON: [/v1/bulletins/10240777](/v1/bulletins/10240777)

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