P1391 — GM — Wheel Speed Sensor 1 G-Sensor Circuit Performance

P1391 (GM): Wheel Speed Sensor 1 G-Sensor Circuit Performance — what it means, the affected system and what to check before replacing parts.

Meaning, symptoms, causes and checks

Wheel Speed Sensor 1 G-Sensor Circuit Performance. Source catalogue definition; confirm applicability using vehicle service information.

Affected system: Powertrain