# Service campaign Dealer 24TT\_20260421

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 campaign
- NHTSA id: 11032215
- Published by NHTSA: 2026\-05\-05
- Manufacturer's number: Dealer 24TT\_20260421
- Manufacturer's date: 2026\-04\-21
- NHTSA component: ENGINE

## NHTSA's summary

Under this service action, updated engine control module \(ECM\) software will be installed to provide robustness improvements to the ECM calibration for the turbocharger variable turbine geometry \(VTG\) actuator endpoints. This has no impact on vehicle emissions. Updated affected vehicles chart. Added note to the work instructions regarding fault code P160900.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11032215-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11032215-9999.pdf)

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

## Components

Engine

## Trouble codes named

P1609

## Vehicles listed

- 2026 VOLKSWAGEN TIGUAN

## Other bulletins for the same vehicles and component

- [V2426012083103\_1](/bulletins/11038148.md), 2026-10-06, Service bulletin: ENGINE. Reference to Service Action 24BD
- [V0116152014815\_20](/bulletins/11038146.md), 2026-10-06, Service bulletin: ENGINE. Suggested fuel additive
- [V1718062017813\_24](/bulletins/11035762.md), 2026-08-05, Service bulletin: ENGINE. Oil Consumption Measurement and Electronic Oil Consumption Measurement
- [V1719012012855\_81](/bulletins/11034617.md), 2026-07-07, Service bulletin: ENGINE. Volkswagen Engine Oil Standards
- [TT 13\-20\-01\_3](/bulletins/11034614.md), 2026-07-07, Service bulletin: ENGINE. Instruction, how to lubicate engine before initial start.
- [TT 10\-18\-02\_2](/bulletins/11034613.md), 2026-07-07, Service bulletin: ENGINE. Lubricating engine components before reassembly.
- [Dealer 24TT](/bulletins/11032214.md), 2026-05-05, Service campaign: ENGINE. Under this service action, updated engine control module \(ECM\) software will be installed to provide robustness improvements to the ECM calibration for the turbocharger variable turbine geometry \(VTG\) actuator endpoints. This has no impact on vehicle emissions.
- [Circular 24TT\_20260421](/bulletins/11032212.md), 2026-05-05, Service campaign: ENGINE. Under this service action, updated engine control module \(ECM\) software will be installed to provide robustness improvements to the ECM calibration for the turbocharger variable turbine geometry \(VTG\) actuator endpoints. This has no impact on vehicle emissions. Updated affected vehicles chart. Added note to the work instructions regarding fault code P160900.
- [Circular 24TT](/bulletins/11032211.md), 2026-05-05, Service campaign: ENGINE. Under this service action, updated engine control module \(ECM\) software will be installed to provide robustness improvements to the ECM calibration for the turbocharger variable turbine geometry \(VTG\) actuator endpoints. This has no impact on vehicle emissions.
- [VOS\-26\-21](/bulletins/11030847.md), 2026-04-06, Service bulletin: ENGINE. This is a notice for software changes with the ODIS diagnostic program to correct the communication during vehicle programming function: A software fix is needed to correct the error message ERP0204E could occur during perform initial operation, software configuration, SVM updates for any control module\(s\) etc.

JSON: [/v1/bulletins/11032215](/v1/bulletins/11032215)

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