U0141moderate severityNetwork
Lost Communication with Front ECM A
on 2004 Subaru Legacy 3.0L H6 · AWD
What this code means
Cannot communicate with the front electronic control module A, often managing front body electronics.
Symptoms
- Front lighting issues
- Front park assist not working
- Front wiper issues
- DRL malfunction
Common causes
- Front ECM failure
- CAN bus wiring
- Module power loss
- Fuse blown
- Front-end collision damage
Diagnostic steps
- Check front ECM fuse
- Test power and ground
- Check CAN wiring
- Inspect for collision damage
- Test module directly
Repair notes
Check for front-end damage. Module located in front of vehicle is susceptible to impact and water.
Other Network codes on this 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
U0009
High Speed CAN Communication Bus Shorted Together
U0010
Medium Speed CAN Communication Bus