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B305A on the 2019 Cadillac ATS

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 B305A
PIC6025D2019-06-10. Service bulletin. This Preliminary Information communication provides the technician with a diagnostic tip for vehicles with intermittent no crack with a "Turn Steering Wheel Start Vehicle Again". If there is a Diagnostic Trouble Code B305A stored history in the Body Control Module it may have been caused by a bound up steering wheel. Review the owner?s manual Starting the Vehicle Messages section with the customer.

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.