how to fix the error code B1B00 in my Volvo XC90 Second Generation (2015-2024)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle battery to ensure safety while working on electrical components.

2. Inspect and Repair Wiring

• Tools Required: Multimeter, wire strippers, electrical tape
• Using the multimeter, check the continuity of wires in the lighting circuit.
• Repair any damaged wires by stripping the ends and using solder or crimp connectors, then insulate with electrical tape.

3. Replace Faulty Components

• Tools Required: Socket set, screwdrivers
• Remove and replace any burned-out light bulbs in the interior lighting.
• If the body control module is found defective, remove it by unscrewing it from its mount and disconnecting the wiring harness. Install the new BCM by reversing the procedure.

4. Reconnect and Test

• Reconnect the vehicle battery.
• Start the vehicle and check if the B1B00 code reappears using the OBD-II scanner.