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Service bulletin 23X1 20180809

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10149828
Published by NHTSA2018-12-03
Manufacturer's number23X1 20180809
Manufacturer's date2018-07-09
NHTSA componentPOWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM:SOFTWARE; ENGINE

NHTSA's summary

Current Engine Control Module software does not properly operate the Leak Detection Pump heater circuit. This can allow moisture to collect within the pump and influence EVAP system measurements, which leads to erroneous EVAP fault codes stored in the ECM memory. REVISED

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Engine, Transmission and driveline, Automatic transmission, Software, Transmission control module

Vehicles listed
VOLKSWAGEN ATLAS2018

Listing a model year does not mean every vehicle of it is concerned: the document says which.

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V0019042054866_42021-09-02. Service bulletin. SD creator instruction, updated to include model year 2022.