U02C0: Lost Communication With Active Radiator Air Flow Control Module A — what it means, the affected system and what to check before replacing parts.
Meaning, symptoms, causes and checks
Lost Communication With Active Radiator Air Flow Control Module A. Basic catalogue definition; diagnostic details have not yet been reviewed.
Affected system: Network communication
Symptoms
- System warning may illuminate
- Affected feature may be unavailable
- Symptoms depend on the vehicle
Possible causes
- Module power or ground loss, connector or network wiring fault, or a module that stopped communicating
- Module power, ground, or connector fault
- Vehicle-specific mechanical or control issue
What to check
- Record all available module faults
- Scan all accessible modules and record which modules report the communication fault. Check battery voltage, module power and ground, connectors, and network wiring using the vehicle topology.
- Compare results with vehicle-specific service information
- Verify the repair
- Scan all accessible modules and record which modules report the communication fault. Check battery voltage, module power and ground, connectors, and network wiring using the vehicle topology.
- Repair the verified cause and rescan all affected modules
Also written as: U02C0-00, U02C000, UO2C0 (some scan tools add the fault-type byte, e.g. -00).