U1001moderate severityNetwork
CAN Communication Bus Fault - No Message
on 2002 BMW M5 4.9L V8 S62 · RWD
What this code means
A required CAN bus message is not being received. A specific module is not broadcasting its data.
Symptoms
- Specific system not responding
- Warning light for affected system
- Feature disabled
- Other modules compensating
Common causes
- Module not powered
- Module failure
- CAN bus wiring open for that module
- Module in sleep mode stuck
- Fuse blown for module
Diagnostic steps
- Identify which module message is missing
- Check fuse for that module
- Test power and ground
- Check CAN wiring to specific module
- Try to wake module with scan tool
Repair notes
Identify the non-broadcasting module and check its power supply and CAN bus connection.
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Other Network codes on this vehicle
CC-ID-181
System Check Failed
CC-ID-207
Central Electronics Failure, Stop Vehicle
U0001
High Speed CAN Communication Bus
U0002
High Speed CAN Communication Bus Performance
U0003
High Speed CAN Communication Bus (+) Open
U0004
High Speed CAN Communication Bus (+) Low
U0005
High Speed CAN Communication Bus (+) High
U0006
High Speed CAN Communication Bus (-) Open
U0007
High Speed CAN Communication Bus (-) Low
U0008
High Speed CAN Communication Bus (-) High