U0064
Lost Communication with Diagnostic Gateway Module
2016-2021 Mazda CX-3 2.0L I4
High SeverityNetworkGeneric (SAE)
Description
Cannot communicate with the diagnostic gateway that routes scan tool communication to vehicle buses.
Symptoms
- Scan tool cannot connect
- OBD port no communication
- Cannot read any DTCs
- Cannot perform diagnostics
Common Causes
- Gateway module power failure
- Gateway module failure
- CAN bus issue to gateway
- OBD port wiring damage
- Fuse blown
Diagnostic Steps
- Check gateway module fuse
- Test power and ground at gateway
- Check OBD port pin connections
- Test CAN wiring from OBD port to gateway
- Verify gateway module operation
Repair Notes
Check OBD port wiring and gateway module power supply. Common on VW/Audi vehicles.
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
U0064 on Other Vehicles
Common Questions
What does code U0064 mean on a 2016-2021 Mazda CX-3?
U0064 stands for "Lost Communication with Diagnostic Gateway Module". Cannot communicate with the diagnostic gateway that routes scan tool communication to vehicle buses.
What are the symptoms of U0064 on a Mazda CX-3?
Common symptoms of U0064 include: Scan tool cannot connect, OBD port no communication, Cannot read any DTCs, Cannot perform diagnostics.
What causes U0064 on a 2016-2021 Mazda CX-3?
Common causes of U0064 include: Gateway module power failure, Gateway module failure, CAN bus issue to gateway, OBD port wiring damage, Fuse blown.