B0460low severityBody
Infotainment System Communication Error
on 2011 Audi A4 2.0L Turbo I4 · AWD
What this code means
Communication loss between the infotainment head unit and other vehicle modules on the entertainment bus.
Symptoms
- Infotainment screen blank
- No audio output
- Navigation not working
- Vehicle settings inaccessible
- Backup camera not displaying
Common causes
- Head unit internal failure
- CAN/MOST bus wiring issue
- Head unit software crash
- Power supply fault
- Connector corrosion
Diagnostic steps
- Attempt system reboot (hold power button)
- Check head unit power and ground
- Scan for communication faults
- Inspect bus wiring
- Check for software updates
Repair notes
Reboot head unit first. If persistent, check bus wiring or replace head unit.
Other Body codes on this vehicle
B0001
Driver Frontal Stage 1 Deployment Control
B0002
Driver Frontal Stage 2 Deployment Control
B0003
Passenger Frontal Stage 1 Deployment Control
B0004
Passenger Frontal Stage 2 Deployment Control
B0005
Driver Knee Airbag Deployment Circuit
B0006
Passenger Knee Airbag Deployment Circuit
B0007
Rear Left Side Airbag Deployment Circuit
B0008
Rear Right Side Airbag Deployment Circuit
B0010
Driver Side Airbag Deployment
B0011
Driver Side Airbag Deployment Circuit Open