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Home >> VinFast >> 2023 >> VF9 Plus >> Repair and Diagnosis (Single Page) >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Vehicle Control Diagnosis (01 Of 10) >> DTC P0A1F-83: Battery Energy Control Module "A" - Value Of Signal Protection Calculation Incorrect >> VinFast DTC Guided Repair Instruction >> Repair Instruction

Repair Instruction

Repair Actions

  1. Check for communication faults with BMS from other ECU's and investigate faults with BMS
  2. If fault returns, check for communication faults from the HV CAN Communication BUS linking VCU and BMS and investigate faults with HV CAN Communication BUS
  3. If fault returns, check electrical circuits between VCU and BMS, repair if faulty and clear DTC
  4. If fault returns, replace BMS and clear DTC
  5. If fault returns, replace VCU and clear DTC