# Service bulletin ONL6WU04282023

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: 10235553
- Published by NHTSA: 2023\-05\-04
- Manufacturer's number: ONL6WU04282023
- Manufacturer's date: 2023\-04\-28
- NHTSA component: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL; ENGINE AND ENGINE COOLING

## NHTSA's summary

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.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10235553-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10235553-9999.pdf)

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

## Components

Engine, Exhaust and emissions

## Vehicles listed

- 2021 to 2022 ACURA TLX

## Other bulletins for the same vehicles and component

- [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.
- [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.
- [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.
- [BTI\&10212022903](/bulletins/10224786.md), 2022-10-24, 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\&10062022908](/bulletins/10222821.md), 2022-10-12, 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.
- [B21\-007](/bulletins/10222078.md), 2022-09-27, Service bulletin: FUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING. "Service Bulletin \- The MIL comes on with DTC P0455 \(Evaporative Emission \[EVAP\] System Very Large Leak Detected\) stored. The fuel main flap unit may have stuck open, causing a DTC to set."
- [B21\-007](/bulletins/10219672.md), 2022-09-14, Service bulletin: ENGINE AND ENGINE COOLING; FUEL SYSTEM, GASOLINE. Dealer message \- The MIL comes on with DTC P0455 \(Evaporative Emission \[EVAP\] System Very Large Leak Detected\) stored. The fuel main flap unit may have stuck open, causing a DTC to set.

JSON: [/v1/bulletins/10235553](/v1/bulletins/10235553)

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