U0064
NetworkCan Bushigh severityLost Communication with Diagnostic Gateway Module
What U0064 Means
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
Where to start: Check OBD port wiring and gateway module power supply. Common on VW/Audi vehicles.
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