U0146
Lost Communication with Gateway Module A
2001-2005 BMW 325i E46 2.5L I6 🇨🇦
High SeverityNetwork
Description
Cannot communicate with the central gateway module that routes data between vehicle networks.
Symptoms
- Multiple systems affected
- Scan tool partial communication
- Cross-network features not working
- Intermittent multi-system faults
Common Causes
- Gateway module failure
- CAN bus wiring issue
- Module power loss
- Fuse blown
- Software corruption
Diagnostic Steps
- Check gateway module fuse
- Test power and ground
- Check CAN wiring on all bus connections
- Try gateway module reprogramming
- Test individual bus segments
Repair Notes
Gateway module connects multiple CAN buses. Failure affects cross-bus communication. Common on German vehicles.
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
U0146 on Other Vehicles
Common Questions
What does code U0146 mean on a 2001-2005 BMW 325i E46?
U0146 stands for "Lost Communication with Gateway Module A". Cannot communicate with the central gateway module that routes data between vehicle networks.
What are the symptoms of U0146 on a BMW 325i E46?
Common symptoms of U0146 include: Multiple systems affected, Scan tool partial communication, Cross-network features not working, Intermittent multi-system faults.
What causes U0146 on a 2001-2005 BMW 325i E46?
Common causes of U0146 include: Gateway module failure, CAN bus wiring issue, Module power loss, Fuse blown, Software corruption.