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P26B1 on the 2021 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 P26B1
No. 196-222025-08-06. Service bulletin. Technical information for Check Engine Warning Light Active / Fault Memory Entry "P26B100/00CB24" in the Thermal Management Control Unit (TME): Re-Programming Control Unit
No. 2221.42024-07-02. Service bulletin. Instructions on advanced technical information for the Cayenne E-Hybrid - thermal management fault (P26B100) causes a check engine light
No. 2221.32023-12-08. Service bulletin. Instructions on advanced technical information for the Cayenne E-Hybrid - thermal management fault (P26B100)
No. 2221.22023-05-03. Service bulletin. Instructions on advanced tehcnical information for the Cayenne E-Hybrid - thermal management fault (P26B100) causes a check engine light
No. 2221.12023-04-06. Service bulletin. Advanced technical information for the Cayenne E-Hybrid - thermal management fault P26B100 Causes Check Engine Light
No. 193-222023-03-04. Service bulletin. Technical information - Check Engine Warning Light Active / Fault Memory Entry "P26B100/00CB24" in the Thermal Management Control Unit (TME):
No. 193-222022-10-05. Service bulletin. Technical information for check engine warning light active/fault memory entry (P26B100/00CB24) in the TME
No. 22212022-09-07. Service bulletin. Instructions on advanced technical information for the Cayenne E-Hybrid thermal management fault. Fault P26B100

8 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.