U1006
CAN Bus Message Timeout
1999-2000 BMW 323i E46 2.5L I6 🇨🇦
Moderate SeverityNetwork
Description
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.
Related Codes
Other Network Codes
- U0001High Speed CAN Communication Bus
- U0002High Speed CAN Communication Bus Performance
- U0003High Speed CAN Communication Bus (+) Open
- U0004High Speed CAN Communication Bus (+) Low
- U0005High Speed CAN Communication Bus (+) High
- U0006High Speed CAN Communication Bus (-) Open
- U0007High Speed CAN Communication Bus (-) Low
- U0008High Speed CAN Communication Bus (-) High
- U0009High Speed CAN Communication Bus Shorted Together
- U0010Medium Speed CAN Communication Bus
U1006 on Other Vehicles
Common Questions
What does code U1006 mean on a 1999-2000 BMW 323i E46?
U1006 stands for "CAN Bus Message Timeout". A required CAN bus message was not received within the expected time window, indicating a module is too slow to respond.
What are the symptoms of U1006 on a BMW 323i E46?
Common symptoms of U1006 include: Intermittent system faults, Delayed responses from systems, Warning lights that come and go, Periodic feature dropouts.
What causes U1006 on a 1999-2000 BMW 323i E46?
Common causes of U1006 include: Module processor overloaded, CAN bus high traffic load, Intermittent wiring connection, Module firmware bug, Power supply voltage drop to module.