U2004moderate severityNetwork
Network Configuration Not Learned
on 2008 Audi R8 4.2L V8 · AWD
What this code means
The vehicle network configuration has not been learned or stored after module replacement or reset.
Symptoms
- Systems not communicating properly
- Features missing after service
- Modules not recognizing each other
- Network topology error
Common causes
- Battery disconnect without relearn
- Module replacement without network setup
- Configuration data lost
- Programming interrupted
Diagnostic steps
- Perform network configuration learn procedure
- Run module discovery scan
- Program as-built data
- Perform SBL (System Bus Learn)
- Complete post-service initialization
Repair notes
Run network configuration or module discovery procedure. Required after replacing network modules.
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00003
Control Module - Defective
01304
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01312
Powertrain Data Bus - Defective
01314
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01315
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01316
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01317
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01318
Immobilizer Control Module - No Communication
01321
Airbag Control Module - No Communication
U0001
High Speed CAN Communication Bus