P0109 — Manifold Absolute Pressure/Barometric Pressure Circuit Intermittent

What it means

P0109 is an OBD-II diagnostic trouble code: Manifold Absolute Pressure/Barometric Pressure Circuit Intermittent.

Typical fix

Confirm the code with an OBD-II scanner, then inspect the component or circuit named above. Consult a vehicle-specific service manual for the full diagnostic and repair procedure.