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P2E91 Powertrain

Battery Charger B Internal Power Supply Performance

The internal low-voltage power supply of battery charger B does not maintain the expected output. Internal regulator drift or overload.

Affected components

  • Battery charger b internal psu

Common causes

  • High likelihood: Internal regulator drifted
  • Medium likelihood: Internal load increased

Possible symptoms

  • Charge status indicator shows fault
  • Charging may not start or interrupts
  • Slower-than-expected charge rate

Diagnostic notes

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

Related codes

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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