U0446

Symptoms

• Incorrect operation of comfort systems (lighting, power windows)
• Check Engine Light Is On
• Errors in other vehicle systems
• Problems starting the engine (in rare cases)

Causes

• Problems with BCM wiring or connectors
• Body Control Module (BCM) Malfunction
• Damage to the CAN bus
• BCM power or ground problems
• Software error in BCM module

How to Fix

1. Check connections and integrity of wiring to the BCM
2. Check fuses associated with the BCM
3. Scan all modules for other CAN bus errors
4. Reflash or replace the BCM if necessary

Related codes

Error U0446 by Vehicle Brand