U0133moderate severityNetwork
Lost Communication with Suspension Control Module A
on 2005 BMW 325i 2.5L I6 M54 · RWD
What this code means
Cannot communicate with the primary suspension control module for adaptive or active suspension.
Symptoms
- Suspension warning light
- Ride quality degraded
- Dampers in default mode
- Sport/comfort mode not available
Common causes
- Suspension module failure
- CAN bus wiring
- Module power loss
- Fuse blown
- Damper solenoid wiring issue
Diagnostic steps
- Check suspension module fuse
- Test power and ground
- Check CAN wiring
- Test damper solenoids
- Scan for suspension DTCs
Repair notes
Active suspension defaults to firm setting when module communication is lost. Check fuses first.
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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