U0153low severityNetwork
Lost Communication with Hands-Free Telephone Module
on 2021 Subaru Legacy 2.5L H4 · AWD
What this code means
Cannot communicate with the Bluetooth or hands-free phone module.
Symptoms
- Bluetooth not connecting
- Hands-free calling disabled
- Phone features in infotainment unavailable
Common causes
- Phone module failure
- CAN bus wiring
- Module power loss
- Fuse blown
- Antenna connection
Diagnostic steps
- Check phone module fuse
- Test power and ground
- Check CAN wiring
- Check Bluetooth antenna
- Test module with diagnostic tool
Repair notes
Check fuses. Module may need software update for newer phone compatibility.
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