Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
There is a Factory Service Bulletin for the 2004 Toyota Camry:
2004 Toyota Camry Factory Service Bulletin OBDDII Code B1650
The cost to diagnose the B1650 2004 TOYOTA CAMRY code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
The Occupant Classification System circuit consists of the Airbag Sensor Assembly Center and the Occupant Classification System. If the Airbags Sensor Assembly Center receives signals from the Occupant Classification ECU, it determines whether or not the Front Passenger Airbag Assembly and the Front Seat Airbag Assembly sight should be operated. The B1650 code is recorded when a malfunction is detected in the Occupant Classification System.
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