B0123 — Pedestrian Alert Speaker B

This code identifies pedestrian-alert speaker B. The label alone does not establish whether the concern is sound output, wiring or the control electronics. Confirm the vehicle-specific code interpretation and keep the pedestrian-alert function operational.

Affected system: Body

Symptoms

• System warning may illuminate
• Affected feature may be unavailable
• Symptoms depend on the vehicle

Possible causes

• Connector or wiring fault, sensor or actuator fault, or a body control module power or ground issue
• Module power, ground, or connector fault
• Vehicle-specific mechanical or control issue

What to check

• Record all available module faults
• Read the body or restraint module with a compatible scan tool. Identify the affected circuit and follow the vehicle-specific safety and test procedure before touching related components.
• Compare results with vehicle-specific service information
• Verify the repair
• Read the body or restraint module with a compatible scan tool. Identify the affected circuit and follow the vehicle-specific safety and test procedure before touching related components.
• Repair the verified cause and rescan all affected modules

Also written as: B0123-00, B012300, BO123 (some scan tools add the fault-type byte, e.g. -00).