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P0A72

Generator Phase V Current

The generator phase V current measurement reports a generic fault. Phase commutation cannot be controlled reliably.

  • Check engine light: Yes
  • Emissions related: No
  • Repair difficulty: hard

Common causes

Ordered by how often each turns out to be the cause.

  • Phase current sensor failedCommon
  • Wiring faultPossible

Parts involved

  • Generator Phase V
  • Inverter

P0A72 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.