The OBD-II port on a Mitsubishi vehicle is located under the dashboard on the driver's side.
Slide under the dashboard on the driver's side and look above the brake pedal. You will see the trapezoid-shaped OBD2 port.
The OBD-II port (OBD2) can be used to diagnose engine, ABS, traction, transmission, and Mitsubishi problems.
All Mitsubishi vehicles sold in the US since 1996 and Europe since 2000 have the OBD2 port under the dash.
This guide applies to all Mitsubishi models, including Lancer, Eclipse, Outlander, Mirage, Galant, Montero, Pajero, etc.