# Service bulletin B21\-028

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: 10202909
- Published by NHTSA: 2021\-11\-03
- Manufacturer's number: B21\-028
- Manufacturer's date: 2021\-10\-26
- NHTSA component: POWER TRAIN; ENGINE AND ENGINE COOLING

## NHTSA's summary

Service Bulletin \- The MIL comes on with DTC P061B \(PCM Internal Malfunction\) is stored.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10202909-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10202909-9999.pdf)

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

## Components

Engine, Transmission and driveline

## Trouble codes named

P061B

## Vehicles listed

- 2019 to 2021 ACURA RDX
- 2021 to 2022 ACURA TLX

## Recalls for the same vehicles and component

- [2021731](/recalls/tc/2021731.md), 2021-12-03: Powertrain
- [21V939000](/recalls/nhtsa/21V939000.md), 2021-12-02: POWER TRAIN:DRIVELINE:DRIVESHAFT

## Other bulletins for the same vehicles and component

- [B25\-049](/bulletins/11023274.md), 2025-09-23, Service bulletin: ENGINE. Service Bulletin \- Oil leak at the cam chain tensioner inspection cover due to and insufficient sealant adhesion on the inspection cover.
- [B25\-048](/bulletins/11023273.md), 2025-09-23, Service bulletin: ENGINE. Service Bulletin \- Oil leak at the cam chain tensioner inspection cover due to and insufficient sealant adhesion on the inspection cover.
- [B23\-010](/bulletins/10252481.md), 2024-04-03, Service bulletin: POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). Service Bulletin \- During engine start in cold conditions, a miscalculation in the PCM causes the air\-fuel ratio to exceed DTC rich criteria.
- [B20\-053](/bulletins/10251896.md), 2024-03-19, Service bulletin: ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Service Bulletin \- The MIL is flashing with a loss of power. This is most common in hot, humid regions, or after a period of rainfall. Humid air within the intake passage may condense and accumulate moisture during steady driving which enters the engine and may cause a misfire and a flashing MIL.
- [ONL6WU04282023](/bulletins/10235553.md), 2023-05-04, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL; ENGINE AND ENGINE COOLING. Owner Notification Letter \- An owner's notification that the owner has not completed the emissions recall for an improperly functioning on\-board emission\-related diagnostic system.
- [BTI\&03282023902](/bulletins/10233673.md), 2023-04-04, Service bulletin: ENGINE AND ENGINE COOLING; FUEL SYSTEM, GASOLINE. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is investigating certain 2020\-2022 MDXs \& RDXs with a client complaint of the Check Engine Light \(CEL\) on \& the DTC P0087 \(Fuel Rail Pressure Too Low \[Loss of Fuel Pressure\]\) stored. In some cases, the customer may also experience such conditions as engine hard to start, no start or start \& stumble in conjunction with CEL. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
- [B23\-010](/bulletins/10233209.md), 2023-03-23, Service bulletin: ENGINE AND ENGINE COOLING. Service Bulletin \- Under certain circumstances, the vehicle may experience driveability concerns. This may result in the following DTC’s to set: • P0300 \(Random Misfire Detected\), • P0301 \(No. 1 Cylinder Misfire Detected\), • P0302 \(No. 2 Cylinder Misfire Detected\), • P0303 \(No. 3 Cylinder Misfire Detected\), • P0304 \(No. 4 Cylinder Misfire Detected\), • P0172 \(Fuel System Too Rich\)
- [BTI\&03132023906](/bulletins/10232969.md), 2023-03-18, Service bulletin: FUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is investigating certain 2020\-2022 MDXs \& RDXs with a client complaint of the Check Engine Light \(CEL\) on \& the DTC P0087 \(Fuel Rail Pressure Too Low \[Loss of Fuel Pressure\]\) stored. In some cases, the customer may also experience such conditions as engine hard to start, no start or start \& stumble in conjunction with CEL. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
- [BTI\&02232023904](/bulletins/10232252.md), 2023-03-02, Service bulletin: ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is investigating certain 2020\-2022 MDXs \& RDXs with a client complaint of the Check Engine Light \(CEL\) on \& the DTC P0087 \(Fuel Rail Pressure Too Low \[Loss of Fuel Pressure\]\) stored. In some cases, the customer may also experience such conditions as engine hard to start, no start or start \& stumble in conjunction with CEL.
- [BTI\&02072023902](/bulletins/10231832.md), 2023-02-15, Service bulletin: FUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING. Dealer Message\- American Honda Motor Co., Inc. \(AHM\) is investigating certain 2020\-2022 MDXs \& RDXs with a client complaint of the Check Engine Light \(CEL\) on \& the DTC P0087 \(Fuel Rail Pressure Too Low \[Loss of Fuel Pressure\]\) stored. In some cases, the customer may also experience such conditions as engine hard to start, no start or start \& stumble in conjunction with CEL. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.

JSON: [/v1/bulletins/10202909](/v1/bulletins/10202909)

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