# Service bulletin B25\-048

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: 11023273
- Published by NHTSA: 2025\-09\-23
- Manufacturer's number: B25\-048
- Manufacturer's date: 2025\-09\-17
- NHTSA component: ENGINE

## NHTSA's summary

Service Bulletin \- Oil leak at the cam chain tensioner inspection cover due to and insufficient sealant adhesion on the inspection cover.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11023273-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11023273-9999.pdf)

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

## Components

Engine

## Vehicles listed

- 2021 to 2025 ACURA TLX

## Other bulletins for the same vehicles and component

- [BTI\&04302025902](/bulletins/11018017.md), 2025-05-06, Other: ENGINE. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2023 RDXs and TLXs with a client complaint of the "Emissions System Warning" Malfunction Indicator Light \(MIL\) on with DTC P2101 \(Electronic Throttle Control System Malfunction\) stored. Client may experience the vehicle going into "limp" mode. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to your attempting a repair of any kind.
- [BTI\&04162025902](/bulletins/11017328.md), 2025-04-29, Other: ENGINE. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2023 RDXs and TLXs with a client complaint of the "Emissions System Warning" Malfunction Indicator Light \(MIL\) on with DTC P2101 \(Electronic Throttle Control System Malfunction\) stored. Client may experience the vehicle going into "limp" mode. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to your attempting a repair of any kind.
- [BTI\&11132024902](/bulletins/11010682.md), 2024-11-19, Other: ENGINE. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2023 RDXs and TLXs with a client complaint of the "Emissions System Warning" Malfunction Indicator Light \(MIL\) on with DTC P2101 \(Electronic Throttle Control System Malfunction\) stored. Client may experience the vehicle going into "limp home" mode. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to your attempting a repair of any kind.
- [BTI\&10242024903](/bulletins/11010126.md), 2024-11-06, Other: ENGINE. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2023 RDXs and TLXs with a client complaint of the "Emissions System Warning" Malfunction Indicator Light \(MIL\) on with DTC P2101 \(Electronic Throttle Control System Malfunction\) stored. Client may experience the vehicle going into "limp home" mode. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to your attempting a repair of any kind.
- [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.
- [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\&12132022904](/bulletins/10228203.md), 2022-12-21, Service bulletin: ENGINE AND ENGINE COOLING. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is investigating certain 2020\-2021 RDXs \& TLX L4s with a client complaint of an oil leak or a dealer technician noticing an oil leak from the head cover gasket during a routine maintenance. To fully understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
- [BTI\&11282022903](/bulletins/10227237.md), 2022-12-06, Service bulletin: ENGINE AND ENGINE COOLING. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is investigating certain 2020\-2021 RDXs \& TLX L4s with a client complaint of an oil leak or a dealer technician noticing an oil leak from the head cover gasket during a routine maintenance. To fully understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
- [BTI\&11072022905](/bulletins/10226204.md), 2022-11-15, Service bulletin: ENGINE AND ENGINE COOLING. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is investigating certain 2020\-2021 RDXs \& TLX L4s with a client complaint of an oil leak or a dealer technician noticing an oil leak from the head cover gasket during a routine maintenance. To fully 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/11023273](/v1/bulletins/11023273)

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