B2420 on the 2012 Infiniti QX56
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.
| ITB14054 | 2021-05-10. Service bulletin. SERVICE INFORMATION If the auto back door will not operate automatically (operates only in manual mode), first note some conditions that may cause this: * Is DTC B2420 set as "current" in the back door control unit? If the auto back door "CLOSE SW" (close switch) state does not change from ON to OFF after 3 attempts to close the auto back door, B2420 will be set and the auto feature will be disabled. Please see this bulletin for further details. |
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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.