• ABS warning light on
• Traction control light on
• Brakes may not function properly
• Faulty ABS Control Module
• Damaged wiring or connectors
• Faulty ECU
ABS: Anti-lock Braking System
ECU: Engine Control Unit
• U0121
• C1234
Your car's computer is having trouble talking to one of the parts that helps control the brakes.
The vehicle's communication network has lost communication with the Anti-lock Brake System (ABS) Control Module.
U0623 is a diagnostic trouble code that indicates a loss of communication with the Anti-lock Brake System (ABS) Control Module. This means that the vehicle's main computer (ECU) is not receiving data from the ABS module, which can affect braking performance and safety features.
• Check for other codes that might indicate a wiring issue.
• Inspect the wiring and connectors to the ABS module.
• Test the ABS module for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the ABS Control Module if faulty.
• Clear the codes and test drive to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Basic hand tools
$300 - $1000
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect and maintain vehicle wiring.
• Ensure all connectors are secure and free of corrosion.
• Have the vehicle's electronic systems checked during regular maintenance.
Communication Error
• Avoid driving aggressively until the issue is resolved.
• Have the vehicle inspected by a professional mechanic.
• Do not ignore the ABS warning light.
Check with the vehicle manufacturer for warranty coverage on electronic components.
This code has been commonly reported in vehicles with complex electronic systems, especially as they age and wiring becomes more susceptible to damage.
High – This issue can affect braking performance and should be addressed immediately.
Driving with a malfunctioning ABS can be dangerous and may not comply with vehicle safety regulations.
• Vehicle must be on and running.
• ABS system must be engaged or tested.
The ABS Control Module is typically located near the brake master cylinder or within the engine compartment.
Q: Can I drive my car with a U0623 code?
A: It's not recommended to drive with this code active, as it can affect your braking system and safety.
Q: How do I reset the ABS light?
A: Fix the underlying issue first, then use an OBD-II scanner to clear the code and reset the light.
