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P1C01 on the 2025 Cadillac Optiq

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 P1C01
PIC66092025-06-04. Service bulletin. This Preliminary information communicates to the dealer a possible location for an engine harness chafe that may cause a Service High Voltage system with charge limited to 26% message with DTC P1C01 or U016B.
25-NA-0672025-04-24. Service bulletin. Some customers may comment on Service High Voltage Warning Message and vehicle in setting P1C01.
PIT6319A2025-02-03. Service bulletin. This Preliminary information communicates that a customer may experience a service high voltage message with a loss of heat. The technician may find P1C01 in history. The technician is advised that updated software will be released in the future. The dealer should advise the customer to cycle the ignition on and off to temporarily resolve the concern.
PIT63192025-01-20. Service bulletin. This Preliminary information communicates that a customer may experience a service high voltage message with a loss of heat. The technician may find P1C01 in history. The technician is advised that updated software will be released in the future. The dealer should advise the customer to cycle the ignition on and off to temporarily resolve the concern.

4 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.