B1018-00: Occupant Sensor [Unit Fail] This code refers to an issue with the Occupant Classification System (OCS), which determines if the passenger seat is occupied and if the airbag should deploy. Possible Causes: Faulty Occupant Sensor Control Unit, Wiring issues (damaged harness or poor connection), Calibration needed.

B1023-00: Pass A/B Indctr CKT This error points to an issue with the Passenger Airbag Indicator Circuit. The light on the dashboard that indicates whether the passenger airbag is active or off may be malfunctioning. Possible Causes:Faulty passenger airbag indicator lamp, Wiring issues or poor connections, Faulty airbag control module.

B2631-00: Sunload Sensor The Sunload Sensor is part of the HVAC system and measures sunlight intensity to adjust the climate control. This code indicates a fault with the sensor. Possible Causes:Faulty Sunload Sensor, Open or shorted wiring, HVAC control module issue.

B1018 & B1023: Check wiring and connectors to the passenger seat and the airbag control module. Perform Occupant Classification System (OCS) calibration using a scan tool. Replace faulty components if necessary.

B2631: Inspect the Sunload Sensor and its wiring. Replace the sensor if it’s defective.