U0154
Lost Communication with Gateway Module B
2016-2021 Mazda CX-3 2.0L I4 🇩🇪
High SeverityNetwork
Description
Cannot communicate with the secondary gateway module on vehicles with multiple gateway controllers.
Symptoms
- Partial cross-network failure
- Specific bus segment communication loss
- Some modules unreachable
Common Causes
- Gateway B module failure
- CAN bus wiring
- Module power loss
- Fuse blown
- Software issue
Diagnostic Steps
- Check gateway B fuse
- Test power and ground
- Check CAN bus connections
- Try module reprogramming
Repair Notes
Secondary gateway handles specific bus segments. Check fuses and bus connections.
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
U0154 on Other Vehicles
Common Questions
What does code U0154 mean on a 2016-2021 Mazda CX-3?
U0154 stands for "Lost Communication with Gateway Module B". Cannot communicate with the secondary gateway module on vehicles with multiple gateway controllers.
What are the symptoms of U0154 on a Mazda CX-3?
Common symptoms of U0154 include: Partial cross-network failure, Specific bus segment communication loss, Some modules unreachable.
What causes U0154 on a 2016-2021 Mazda CX-3?
Common causes of U0154 include: Gateway B module failure, CAN bus wiring, Module power loss, Fuse blown, Software issue.