Code
U0100
Network
Perte de communication avec le calculateur moteur
Un module ne communique plus avec le calculateur moteur.
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Most likely causes
- Connecteur débranché
- Câblage CAN
- Calculateur HS
Symptoms you may notice
- Many warning lights
- Engine may not start
- Scan tool cannot talk to ECM
Checks to run
- Check ECM power and grounds
- Test CAN bus resistance and continuity
- Inspect connectors
Tools you may need
Multimeter
OBD-II scanner
Always diagnose before replacing. Codes share symptoms; confirm the cause with measurements before buying parts.