# Service bulletin A21\-081

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: 10203445
- Published by NHTSA: 2021\-11\-09
- Manufacturer's number: A21\-081
- Manufacturer's date: 2021\-11\-04
- NHTSA component: ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM

## NHTSA's summary

Service Bulletin \- The MIL comes on with DTCs P0441 \(EVAP System Purge Flow Malfunction\) P04F1 \(EVAP System Low Purge Flow Detected\).

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10203445-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10203445-9999.pdf)

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

## Components

Electrical system, Engine

## Trouble codes named

P0441, P04F1

## Vehicles listed

- 2017 to 2022 HONDA CR\-V

## Recalls for the same vehicles and component

- [23V844000](/recalls/nhtsa/23V844000.md), 2023-12-13: ELECTRICAL SYSTEM:12V/24V/48V BATTERY:CABLES
- [20V798000](/recalls/nhtsa/20V798000.md), 2020-12-17: ELECTRICAL SYSTEM:PROPULSION SYSTEM:CHARGING:MODULE:SOFTWARE; ELECTRICAL SYSTEM:PROPULSION SYSTEM:DC/DC CONVERTER; ELECTRICAL SYSTEM:12V/24V/48V BATTERY
- [19V383000](/recalls/nhtsa/19V383000.md), 2019-05-21: AIR BAGS:FRONTAL:DRIVER CLOCKSPRING/SPIRAL CASSETTE; ELECTRICAL SYSTEM:HORN; AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR MODULE; STEERING: STEERING WHEEL/HANDLE BAR

## Other bulletins for the same vehicles and component

- [A26\-098](/bulletins/11037710.md), 2026-10-01, Service bulletin: ENGINE. Service Bulletin \- Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience overheating, coolant loss, and/or misfire. In some cases, DTCs P0300 through P0304 may also be stored \(DTCs are not required for repair\).
- [A26\-018](/bulletins/11037705.md), 2026-10-01, Service bulletin: ENGINE. Service Bulletin \- Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience overheating, coolant loss, and/or misfire. In some cases, DTCs P0300 through P0304 may also be stored \(DTCs are not required for repair\).
- [A26\-016](/bulletins/11037702.md), 2026-10-01, Service bulletin: ENGINE. Service Bulletin \- Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience overheating, coolant loss, and/or misfire. In some cases, DTCs P0300 through P0304 may also be stored \(DTCs are not required for repair\).
- [A26\-098](/bulletins/11036650.md), 2026-09-02, Service bulletin: ENGINE. Service Bulletin \- Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience overheating, coolant loss, misfire, and/or DTCs P0300 thru P0304 stored.
- [AEBM08262026901](/bulletins/11036424.md), 2026-08-27, Other: ENGINE. Dealer Message \- Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience overheating, coolant loss, misfire, and/or DTCs P0300 through P0304 stored.
- [A26\-098](/bulletins/11036418.md), 2026-08-27, Service bulletin: ENGINE. Service Bulletin \- Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience overheating, coolant loss, misfire and/or DTCs P0300 thru P0304 stored.
- [A26\-018](/bulletins/11036415.md), 2026-08-27, Service bulletin: ENGINE. Service Bulletin \- Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience overheating, coolant loss, misfire and/or DTCs P0300 thru P0304 stored.
- [A26\-016](/bulletins/11036413.md), 2026-08-27, Service bulletin: ENGINE. Service Bulletin \- Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience overheating, coolant loss, misfire and/or DTCs P0300 thru P0304 stored.
- [ATI\&03272026903](/bulletins/11030672.md), 2026-04-03, Other: ENGINE. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2021 CR\-V FHEVs with a customer complaint of an oil leak coming from the passenger side transmission/differential oil seal. The leak may also be found during normal service or an oil change. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind.
- [ATI\&03112026901](/bulletins/11030073.md), 2026-03-16, Other: ENGINE. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2021 CR\-V FHEVs with a customer complaint of an oil leak coming from the passenger side transmission/differential oil seal. The leak may also be found during normal service or an oil change. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind.

JSON: [/v1/bulletins/10203445](/v1/bulletins/10203445)

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