U0029
Vehicle Communication Bus B Performance
1996-1999 BMW 318i E36 1.9L I4 M44
Moderate SeverityNetworkGeneric (SAE)
Description
CAN bus B performance is degraded with intermittent communication issues.
Symptoms
- Secondary systems intermittent
- Body control functions erratic
- Climate control glitches
Common Causes
- Wiring degradation on bus B
- Module fault on bus B
- Poor splice connections
- Aftermarket device loading bus
Diagnostic Steps
- Scope bus B signals
- Check bus B termination
- Inspect bus B wiring
- Isolate modules on bus B
Repair Notes
Diagnose bus B wiring and termination. Check for aftermarket device interference.
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
U0029 on Other Vehicles
Common Questions
What does code U0029 mean on a 1996-1999 BMW 318i E36?
U0029 stands for "Vehicle Communication Bus B Performance". CAN bus B performance is degraded with intermittent communication issues.
What are the symptoms of U0029 on a BMW 318i E36?
Common symptoms of U0029 include: Secondary systems intermittent, Body control functions erratic, Climate control glitches.
What causes U0029 on a 1996-1999 BMW 318i E36?
Common causes of U0029 include: Wiring degradation on bus B, Module fault on bus B, Poor splice connections, Aftermarket device loading bus.