U0161
Lost Communication with Convenience Module A
2016-2021 Mazda CX-3 2.0L I4
Low SeverityNetworkGeneric (SAE)
Description
Cannot communicate with the convenience electronics module managing keyless entry, approach lighting, etc.
Symptoms
- Keyless entry not working
- Welcome lights not activating
- Convenience features disabled
- Auto-fold mirrors not working
Common Causes
- Convenience module failure
- CAN bus wiring
- Module power loss
- Fuse blown
Diagnostic Steps
- Check convenience module fuse
- Test power and ground
- Check CAN wiring
- Test individual convenience features
- Inspect module connector
Repair Notes
Check fuses and BCM integration. Convenience features often managed through BCM sub-module.
Related Codes
Other Network Codes
- U0001High Speed CAN Communication Bus
- U0001High Speed CAN Communication Bus
- U0002High Speed CAN Communication Bus Performance
- U0002High Speed CAN Communication Bus Performance
- U0003High Speed CAN Communication Bus (+) Open
- U0003High Speed CAN Communication Bus (+) Open
- U0004High Speed CAN Communication Bus (+) Low
- U0004High Speed CAN Communication Bus (+) Low
- U0005High Speed CAN Communication Bus (+) High
- U0005High Speed CAN Communication Bus (+) High
U0161 on Other Vehicles
Common Questions
What does code U0161 mean on a 2016-2021 Mazda CX-3?
U0161 stands for "Lost Communication with Convenience Module A". Cannot communicate with the convenience electronics module managing keyless entry, approach lighting, etc.
What are the symptoms of U0161 on a Mazda CX-3?
Common symptoms of U0161 include: Keyless entry not working, Welcome lights not activating, Convenience features disabled, Auto-fold mirrors not working.
What causes U0161 on a 2016-2021 Mazda CX-3?
Common causes of U0161 include: Convenience module failure, CAN bus wiring, Module power loss, Fuse blown.