U0242
NetworkModule Communicationmoderate severityLost Communication With Instrument Panel Control Module C
What U0242 Means
The main module lost communication with instrument panel control module C on the data bus. This can cause dash functions tied to that module to stop working.
Symptoms
- Warning lights on dash
- Instrument panel features not working
- Intermittent gauge dropouts
Common Causes
- Faulty instrument panel control module C
- Wiring or connector fault on bus
- Loss of power or ground to module
- Corroded or damaged CAN bus wiring
Diagnostic Steps
- Scan all modules for U-codes
- Check power and ground at module C
- Inspect CAN bus wiring and connectors
- Test module C, replace if faulty
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