B0105: Sensor Cleaning Air Blower Actuator B Control Relay

What it means

This code identifies a fault associated with Sensor Cleaning Air Blower Actuator B Control Relay. The code alone does not specify the failure mode.

How it works

Sensor Cleaning Air Blower Actuator B Control Relay switches or supplies power for blower actuator B. B0105 points to a fault associated with this relay function, but does not specify whether the relay, wiring, or power supply is at fault.

Common causes

Most likely first.

1. Faulty relay
2. Open or shorted wiring
3. Loose or corroded connector
4. Blown fuse

Symptoms

• Sensor or camera visibility warning
• Reduced sensor function
• Warning light or message

How to diagnose it

1. Scan the relevant module for B0105 and associated blower or relay codes, then review freeze-frame or live data for the actuator B relay command.
2. Identify the actuator B control relay from the wiring diagram and inspect its socket, connector, and wiring for corrosion, heat damage, loose contact, or chafing.
3. Check the relay fuse and supply circuit against the wiring diagram and manufacturer's specification.
4. Test the relay's control and switched circuits for opens, shorts, and poor connections using the manufacturer's procedure.
5. Test the relay against the manufacturer's specification or, where permitted, compare it with a known-good relay specified for the same circuit.

Common fixes

• Clean and secure the actuator B relay connector or socket.
• Repair damaged actuator B relay control or supply wiring.
• Replace the failed fuse after identifying and correcting the cause.
• Replace the actuator B control relay if it fails testing.
• Repair the controlling module only if its relay command is confirmed faulty.

Can I keep driving?

The vehicle is generally drivable, but blower actuator B may not operate, so its sensor or camera may become obscured. Keep the sensor area clean and use caution with related driver-assistance features when visibility is poor.