P1401 — BMW — Heated Catalyst Current Too High During Heating Bank 1

P1401 (BMW): Heated Catalyst Current Too High During Heating Bank 1 — what it means, the affected system and what to check before replacing parts.

Meaning, symptoms, causes and checks

Heated Catalyst Current Too High During Heating Bank 1. Source catalogue definition; confirm applicability using vehicle service information.

Affected system: Powertrain