U1006moderate severityNetwork
CAN Bus Message Timeout
on 2023 BMW i7 M70 Dual Motor AWD · AWD
What this code means
A required CAN bus message was not received within the expected time window, indicating a module is too slow to respond.
Symptoms
- Intermittent system faults
- Delayed responses from systems
- Warning lights that come and go
- Periodic feature dropouts
Common causes
- Module processor overloaded
- CAN bus high traffic load
- Intermittent wiring connection
- Module firmware bug
- Power supply voltage drop to module
Diagnostic steps
- Monitor CAN bus load percentage
- Check module software version for updates
- Test module power supply stability
- Check for intermittent wiring connections
- Scope CAN bus timing
Repair notes
Update module software if available. Check power supply stability and wiring connections.
Other Network codes on this 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
U0009
High Speed CAN Communication Bus Shorted Together
U0010
Medium Speed CAN Communication Bus