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P0A1A Powertrain

Generator Control Module

The generator control module reports a generic fault. Internal self-tests fail or response time outside calibration.

Affected components

  • Generator control module

Common causes

  • High likelihood: Internal module fault
  • Medium likelihood: Communication degraded

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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