P1390 — Mazda — Octane Adjust Shorting Bar Out Or Circuit Open

P1390 (Mazda): Octane Adjust Shorting Bar Out Or Circuit Open — what it means, the affected system and what to check before replacing parts.

Meaning, symptoms, causes and checks

Octane Adjust Shorting Bar Out Or Circuit Open. Source catalogue definition; confirm applicability using vehicle service information.

Affected system: Powertrain