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B16A3 on the 2021 Porsche Taycan

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.

This code is specific to a manufacturer and is not described here. Its meaning is in the manufacturer's service information.

Bulletins for this model year that name B16A3
No. 54-252025-09-05. Service bulletin. Technical information for Lack of Cooling Power or Air-Conditioning System Failure - Fault Memory Entry "B16A284" / "B16A384": Observe Procedure for Air Conditioning Testing (54/25)

1 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.