P1457 — BMW — Heated Catalyst Heater Power Switch Temperature Sensor Electrical Bank 1

P1457 (BMW): Heated Catalyst Heater Power Switch Temperature Sensor Electrical B… — what it means, the affected system and what to check before replacing parts.

Meaning, symptoms, causes and checks

Heated Catalyst Heater Power Switch Temperature Sensor Electrical Bank 1. Source catalogue definition; confirm applicability using vehicle service information.

Affected system: Powertrain