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P0A12 Powertrain

DC/DC Converter Communication

The hybrid control module loses CAN bus communication with the DC/DC converter for longer than the fault threshold.

Affected components

  • Dc dc converter
  • Can bus
  • Hybrid control module

Common causes

  • High likelihood: CAN bus fault
  • Medium likelihood: Converter unpowered or offline
  • Low likelihood: Gateway module routing CAN messages incorrectly

Diagnostic notes

  • The malfunction indicator lamp may illuminate

Sources

Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.

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