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Service bulletins for the 2025 Porsche Cayenne

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.

329 on file from NHTSA, as of 2026-10-19.

About P2421 on the 2025 Porsche Cayenne: what the code means, and the bulletins and recalls about the same components.

By type

By component

By trouble code

Only bulletins with trouble code: P2421 are shown. Show all

Bulletins, newest first
No. 10-252026-02-06. Service bulletin. ELECTRICAL SYSTEM. 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
No. 2521.12025-10-08. Service bulletin. FUEL/PROPULSION SYSTEM. Instructions on advanced technical information for the Cayenne. DME P242100 – Fuel Tank Isolation Valve for Tank Ventilation System Stuck Open
No. 25212025-09-09. Service bulletin. ENGINE. 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
No. 10-252025-04-07. Service bulletin. ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM; ENGINE. Technical Information - Malfunction Indicator Light Active / Fault Memory Entry "P242100" or "P242200" in DME Control Unit: Observe Guided Troubleshooting (10 / 25)
No. 25012025-03-05. Service bulletin. FUEL/PROPULSION SYSTEM. Advanced Technical Information - E3.II Cayenne PHEV: DME P242100 - Fuel Tank Isolation Valve for Tank Ventilation System - Stuck Open

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.