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P1679 – CAN Communication Error (Instrument Cluster)

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Symptoms

  • Dead gauges
  • Warning lights

Causes

  • Cluster failure
  • Wiring issue
  • CAN bus fault

Diagnosis

  • Inspect wiring
  • Check CAN signals
  • Scan cluster

Repair

  • Repair wiring
  • Replace cluster
  • Repair CAN network
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