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Service bulletin Dealer 23EP

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 id10244521
Published by NHTSA2023-11-06
Manufacturer's numberDealer 23EP
Manufacturer's date2023-10-23
NHTSA componentENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE

NHTSA's summary

Vehicles included in this action have been identified as having received the Diesel Approved Emissions Modification (AEM). Volkswagen dealers will inspect the software level on the vehicle's Engine Control Module (ECM) to ensure that the AEM software level is current. If a software discrepancy is found, the ECM software will be updated free of charge. Please note that the ECM software check will automatically result in a check of the Transmission Control Module (TCM) software level, which would also be updated to the AEM level, if a software discrepancy is found. Only in the event that current software is not found on a vehicle, there could be an impact on vehicle tailpipe emissions.

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

Engine, Engine control module

Vehicles listed
VOLKSWAGEN TOUAREG2009, 2010, 2011, 2012

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

Other bulletins for the same vehicles and component
UPDATE23i12024-04-01. Service bulletin. TDI ECM Software Update (FED_EMS)
Circular 23EP2023-11-06. Service bulletin. Vehicles included in this action have been identified as having received the Diesel Approved Emissions Modification (AEM). Volkswagen dealers will inspect the software level on the vehicle's Engine Control Module (ECM) to ensure that the AEM software level is current. If a software discrepancy is found, the ECM software will be updated free of charge. Please note that the ECM software check will automatically result in a check of the Transmission Control Module (TCM) software level, which would also be updated to the AEM level, if a software discrepancy is found. Only in the event that current software is not found on a vehicle, there could be an impact on vehicle tailpipe emissions.
Edition542023-09-18. Service bulletin. VW Elsa Newsletter
Edition1092023-09-18. Service bulletin. VW Elsa Newsletter
TB23i12023-09-05. Service bulletin. TDI ECM Software Update (FED_EMS)
TB0114202023-08-28. Service bulletin. Update Programming, MIL ON, DTCs P0420, P0430 Stored in ECM Fault Memory
TB0114182023-08-28. Service bulletin. Update Programming - Cylinder Contribution Faults P0263, P0266, P0269, P0272, P0275 and/or P0278 Stored in ECM Fault Memory
TB0113112023-08-28. Service bulletin. Update Programming - MIL ON, DTC P0263, P0266, P0269, P0272, P0275 and/or P0278 Stored in ECM Fault Memory
Guide2023-08-14. Service bulletin. P0102, P1128, P1296 - WA front oxygen sensor faults
TT201301a2023-07-10. Service bulletin. To clear static ECM fault P1250 ?Fuel Level Too Low?, add fuel to vehicle and complete a road test of at least 10 miles. Simply adding fuel without completing a road test may not allow fault to clear.