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B1650 on the 2017 Subaru Forester

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 B1650
07-108-16R2018-10-01. Service bulletin. This Service Information Bulletin provides a revised troubleshooting procedure and tips to follow when diagnosing a DTC B1650- ?Occupant Classification System Malfunction?. This DTC may also be accompanied by B1760, B1761, B1771 or B1795 as found in the Occupant Detection control module. The new procedure is designed to help avoid unnecessary part (seat cushion assembly) replacements.
07-108-16R2018-06-18. Service bulletin. This Service Information Bulletin provides a revised troubleshooting procedure and tips to follow when diagnosing a DTC B1650-?Occupant Classification System Malfunction?. This DTC may also be accompanied by B1760, B1761, B1771 or B1795 as found in the Occupant Detection control module. The new procedure is designed to help avoid unnecessary part (seat cushion assembly) replacements.
07-108-16R2018-05-29. Service bulletin. This Service Information Bulletin provides a revised troubleshooting procedure and tips to follow when diagnosing a DTC B1650- ?Occupant Classification System Malfunction?. This DTC may also be accompanied by B1760, B1761, B1771 or B1795 as found in the Occupant Detection control module. The new procedure is designed to help avoid unnecessary part (seat cushion assembly) replacements.
07-108-16R2018-04-02. Service bulletin. This Service Information bulletin provides a procedure for diagnosis of Occupant Detection System (ODS) DTC B1760- Sensor Mat Abnormal and/or B1650- Occupant Classification System Malfunction. This information replaces the current procedure until the Service Manual is updated in the near future. DTC B1760 and/or B1650 may set if liquid inadvertently spilled onto the seat cushion (or rain water entering from a window left open) penetrates the upholstery and reaches the sensor mat. These DTCs can also set under high humidity conditions.

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.