U0063
NetworkModule Communicationhigh severityControl Module Communication Bus F Shorted To Ground
What U0063 Means
The F communication bus wiring is shorted to ground, cutting off data between modules. This can cause multiple modules to lose communication with each other.
Symptoms
- Warning lights on dash
- Multiple modules not responding
- Features not working
Common Causes
- Bus F wiring shorted to ground
- Chafed or damaged harness
- Corroded connector
- Faulty control module
Diagnostic Steps
- Scan all modules for U-codes
- Inspect bus F wiring for shorts to ground
- Measure bus voltage and resistance
- Repair wiring or replace faulty module
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