• ABS warning light on
• Brakes may not function as expected
• Loss of certain braking features
• Faulty Brake System Control Module
• Damaged wiring or connectors
• Issues with the CAN bus network
PCM: Powertrain Control Module
BSCM: Brake System Control Module
CAN bus: Controller Area Network bus
• U0100
• U0121
Your car's computer can't talk to the one that controls the brakes. It's like when your phone can't connect to the internet.
The vehicle's main computer has lost communication with the Brake System Control Module.
U0108 is a diagnostic trouble code indicating a loss of communication with the Brake System Control Module (BSCM). This code is set when the vehicle's primary control module, typically the Powertrain Control Module (PCM), cannot communicate with the BSCM over the Controller Area Network (CAN) bus.
• Check for other codes that might indicate a specific issue.
• Inspect the wiring and connectors to the BSCM for damage.
• Test the CAN bus network for continuity and proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the Brake System Control Module if faulty.
• Ensure the CAN bus network is functioning correctly.
• OBD-II scanner
• Multimeter
• CAN bus tester
$200 - $1000
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect wiring and connectors for damage.
• Ensure the vehicle's software is up to date.
• Avoid harsh driving conditions that may damage electronic systems.
Communication Issue
• Have a professional diagnose the issue to prevent brake failure.
• Do not ignore the ABS warning light.
• Regular maintenance can help prevent such issues.
Check with your vehicle manufacturer; some components may be covered under warranty.
U0108 has been a common issue in vehicles with advanced braking systems, especially as electronic control systems have become more prevalent.
High – This can affect braking performance, which is critical for safety.
Driving with impaired brakes can be dangerous and may violate traffic laws. Address this issue promptly.
• Vehicle must be on and running.
• ABS system should be active.
The Brake System Control Module is usually located near the brake pedal or in the engine compartment.
Q: Can I drive with code U0108?
A: It's not recommended, as it can affect your braking system's performance.
Q: How do I reset the U0108 code?
A: Fix the underlying issue first, then use an OBD-II scanner to clear the code.
