# P2421 on the 2025 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

- [11028553](https://open.wenmarpro.com/bulletins/11028553), 2026-02-06: Technical information for Malfunction Indicator Light Active/Fault Memory Entry regarding Tank Shut\-Off Valve Tank Ventilation System “P242100” or “P242200” in DME Control Unit
- [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
- [11016731](https://open.wenmarpro.com/bulletins/11016731), 2025-04-07: Technical Information \- Malfunction Indicator Light Active / Fault Memory Entry "P242100" or "P242200" in DME Control Unit: Observe Guided Troubleshooting \(10 / 25\)
- [11015119](https://open.wenmarpro.com/bulletins/11015119), 2025-03-05: Advanced Technical Information \- E3.II Cayenne PHEV: DME P242100 \- Fuel Tank Isolation Valve for Tank Ventilation System \- Stuck Open