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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

  1. Connecteur débranché
  2. Câblage CAN
  3. Calculateur HS

Symptoms you may notice

  • Many warning lights
  • Engine may not start
  • Scan tool cannot talk to ECM

Checks to run

  1. Check ECM power and grounds
  2. Test CAN bus resistance and continuity
  3. 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.

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