P3001 – HV Battery ECU Communication Error

Description

The ECM detects communication failure between HV battery ECU and hybrid control module.

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Symptoms

  • Reduced power
  • Hybrid warning light

Causes

  • Faulty ECU
  • CAN communication fault
  • Wiring issues

Diagnosis

  • Check CAN network
  • Inspect wiring
  • Test HV battery ECU

Repair

  • Repair wiring
  • Replace HV battery ECU