U0431moderate severityNetwork
Invalid Data Received From Body Control Module A
on 2005-2011 Audi A6 4.2L V8 · AWD
What this code means
The network is receiving invalid or implausible data from Body Control Module A. Since the BCM manages many body electronics, this can cause a range of odd electrical faults.
Symptoms
- Multiple electrical features malfunction
- Warning lights on dash
- Lights, locks, or windows act erratically
Common causes
- Faulty body control module
- Wiring or connector corrosion at BCM
- Low battery voltage or bad ground
- CAN bus communication fault
Diagnostic steps
- Scan all modules for related codes
- Check battery voltage and BCM grounds
- Inspect BCM wiring and connectors
- Test CAN bus signals to the BCM
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Other Network codes on this vehicle
00003
Control Module - Defective
01304
Radio - No Communication
01312
Powertrain Data Bus - Defective
01314
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01315
Transmission Control Module (TCM) - No Communication
01316
ABS Control Module - No Communication
01317
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01318
Immobilizer Control Module - No Communication
01321
Airbag Control Module - No Communication
U0001
High Speed CAN Communication Bus