# Service bulletin Circular 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.

- Type: Service bulletin
- NHTSA id: 10244519
- Published by NHTSA: 2023\-11\-06
- Manufacturer's number: Circular 23EP
- Manufacturer's date: 2023\-10\-24
- NHTSA component: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\)

## 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

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10244519-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10244519-9999.pdf)

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

## Components

Engine, Engine control module

## Vehicles listed

- 2009 to 2012 VOLKSWAGEN TOUAREG

## Other bulletins for the same vehicles and component

- [UPDATE23i1](/bulletins/10252230.md), 2024-04-01, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\). TDI ECM Software Update \(FED\_EMS\)
- [Dealer 23EP](/bulletins/10244521.md), 2023-11-06, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE. 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.
- [Edition54](/bulletins/10242376.md), 2023-09-18, Service bulletin: SERVICE BRAKES; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE. VW Elsa Newsletter
- [Edition109](/bulletins/10242358.md), 2023-09-18, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\); ELECTRICAL SYSTEM. VW Elsa Newsletter
- [TB23i1](/bulletins/10241754.md), 2023-09-05, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\); ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE. TDI ECM Software Update \(FED\_EMS\)
- [TB011420](/bulletins/10241323.md), 2023-08-28, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE. Update Programming, MIL ON, DTCs P0420, P0430 Stored in ECM Fault Memory
- [TB011418](/bulletins/10241321.md), 2023-08-28, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE. Update Programming \- Cylinder Contribution Faults P0263, P0266, P0269, P0272, P0275 and/or P0278 Stored in ECM Fault Memory
- [TB011311](/bulletins/10241283.md), 2023-08-28, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\). Update Programming \- MIL ON, DTC P0263, P0266, P0269, P0272, P0275 and/or P0278 Stored in ECM Fault Memory
- [Guide](/bulletins/10240605.md), 2023-08-14, Service bulletin: UNKNOWN OR OTHER; ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\). P0102, P1128, P1296 \- WA front oxygen sensor faults
- [TT201301a](/bulletins/10238960.md), 2023-07-10, Service bulletin: UNKNOWN OR OTHER; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\); FUEL SYSTEM, OTHER. 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.

JSON: [/v1/bulletins/10244519](/v1/bulletins/10244519)

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