P1221 — GM — Throttle Position (TP) Sensor 1 2 Correlation

P1221 (GM): Throttle Position (TP) Sensor 1 2 Correlation — what it means, the affected system and what to check before replacing parts.

Meaning, symptoms, causes and checks

Throttle Position (TP) Sensor 1 2 Correlation. Source catalogue definition; confirm applicability using vehicle service information.

Affected system: Powertrain