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P0A4B Powertrain

Generator Position Sensor Circuit

The generator rotor position sensor reports a circuit fault. Phase commutation cannot be controlled reliably.

Affected components

  • Generator position sensor
  • Wiring harness
  • Hybrid control module

Common causes

  • High likelihood: Position sensor failed
  • Medium likelihood: Wiring fault

Diagnostic notes

  • The malfunction indicator lamp may illuminate
  • Reduced-power or limp mode may occur

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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