P0AC4 Hybrid Powertrain Control Module Requested MIL Illumination

P0AC4 Hybrid Powertrain Control Module Requested MIL Illumination

SYMPTOMS:

  • “Check Engine” Light is On
  • Symptoms will vary depending on the underlying issue that triggered this code.

POSSIBLE CAUSES:

  • This is a generic fault code indicating the Hybrid Control Module has detected a problem. The actual cause is stored in other, more specific, error codes.
  • Faulty hybrid battery pack module
  • Poor electrical connection in the hybrid powertrain circuit

"Hybrid Battery Acting Up?"

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