P1781 — Ford — 4x4 Low Switch is Out of Self-Test Range

P1781 (Ford): 4x4 Low Switch is Out of Self-Test Range — what it means, the affected system and what to check before replacing parts.

Meaning, symptoms, causes and checks

4x4 Low Switch is Out of Self-Test Range. Source catalogue definition; confirm applicability using vehicle service information.

Affected system: Powertrain