# P2421 on the 2026 Porsche Cayenne

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

Nobody has written a description of this code yet.

## Bulletins for this model year that name P2421

- [11024154](https://open.wenmarpro.com/bulletins/11024154), 2025-10-08: Instructions on advanced technical information for the Cayenne. DME P242100 – Fuel Tank Isolation Valve for Tank Ventilation System Stuck Open
- [11022936](https://open.wenmarpro.com/bulletins/11022936), 2025-09-09: Instructions on advanced technical information for the Cayenne DME P242100 – Fuel Tank Isolation Valve for Tank Ventilation System Stuck Open. Models affected are 9YAAV1, 9YABN1, 9YACT1, 9YBAV1, 9YBBN1, 9YBCT1