P1657 — GM — 1 4 Upshift Solenoid Control Circuit

P1657 (GM): 1 4 Upshift Solenoid Control Circuit — what it means, the affected system and what to check before replacing parts.

Meaning, symptoms, causes and checks

1 4 Upshift Solenoid Control Circuit. Source catalogue definition; confirm applicability using vehicle service information.

Affected system: Powertrain