P1477 — BMW — Leakage Diagnostic Pump Reed Switch Did Not Open

P1477 (BMW): Leakage Diagnostic Pump Reed Switch Did Not Open — what it means, the affected system and what to check before replacing parts.

Meaning, symptoms, causes and checks

Leakage Diagnostic Pump Reed Switch Did Not Open. Source catalogue definition; confirm applicability using vehicle service information.

Affected system: Powertrain