P1456 — BMW — Heated Catalyst Heater Power Supply Open Circuit Bank 1

P1456 (BMW): Heated Catalyst Heater Power Supply Open Circuit Bank 1 — what it means, the affected system and what to check before replacing parts.

Meaning, symptoms, causes and checks

Heated Catalyst Heater Power Supply Open Circuit Bank 1. Source catalogue definition; confirm applicability using vehicle service information.

Affected system: Powertrain