A "circuit open" failure means electricity cannot flow through the passenger airbag indicator circuit. Here are the most frequent causes on Nissan vehicles:
: If the vehicle was in even a minor accident, the system may store "crash data" that requires a professional reset or module replacement. Diagnostic Steps nissan error-b1436-13
The wires running from the front bumper to the main harness are exposed to the elements. Over time, corrosion from road salt (especially in winter climates) can eat through the insulation, causing the wire to corrode and break. Rodents (mice and squirrels) also love to chew on soy-based wire insulation, often causing damage in this area. A "circuit open" failure means electricity cannot flow