U0047
NetworkModule Communicationhigh severityControl Module Communication Bus D High
What U0047 Means
The voltage on communication bus D is reading higher than normal. This can disrupt data sharing between control modules on that circuit.
Symptoms
- Warning lights on dash
- Modules not responding
- Intermittent electrical faults
Common Causes
- Short to voltage on bus D wiring
- Faulty control module
- Corroded connectors
- Damaged wiring harness
Diagnostic Steps
- Scan all modules for codes
- Check bus D wiring for short to power
- Measure bus voltage with scope
- Inspect and test suspect modules
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