U0304
Software Incompatibility with Cruise Control Module
1999-2000 BMW 323i E46 2.5L I6 🇩🇪
Moderate SeverityNetwork
Description
Software incompatibility with the cruise control system causing data errors.
Symptoms
- Cruise control erratic
- Adaptive cruise not engaging
- Speed set point drifting
- Cruise control disabling unexpectedly
Common Causes
- Cruise module software outdated
- Software conflict after update
- Module version mismatch
Diagnostic Steps
- Check cruise control module software version
- Update module software
- Check for known software conflicts
- Verify module compatibility
Repair Notes
Update cruise control module software to version compatible with other vehicle modules.
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
U0304 on Other Vehicles
Common Questions
What does code U0304 mean on a 1999-2000 BMW 323i E46?
U0304 stands for "Software Incompatibility with Cruise Control Module". Software incompatibility with the cruise control system causing data errors.
What are the symptoms of U0304 on a BMW 323i E46?
Common symptoms of U0304 include: Cruise control erratic, Adaptive cruise not engaging, Speed set point drifting, Cruise control disabling unexpectedly.
What causes U0304 on a 1999-2000 BMW 323i E46?
Common causes of U0304 include: Cruise module software outdated, Software conflict after update, Module version mismatch.