Decided to check the codes and see what the ECU has to say.

NOTE: There's an app for Android called Torque that displays ECU readings on your phone in real time. I bought a $30 obd2 bluetooth reader and the app, which was like $5. Next best thing to a data logger IMO.

P0136: O2 Sensor Circuit Malfunction (Bank 1 Sensor 2)
P0141: O2 Sensor Heater Circuit (Bank 1 Sensor 2)
P0120: Throttle/Pedal Position Sensor/Switch A Circuit
P0443: Evaporative Emission Control System Purge Control Valve Circuit
P1105: [Mitsubishi] Fuel Pressure Solenoid.
P0403: Exhaust Gas Recirculation Control Circuit

Pending Fault Log (not sure what this means, but I'm guessing it's seeing a possible error)
------------------
P0136: O2 Sensor Circuit Malfunction (Bank 1 Sensor 2)
P0141: O2 Sensor Heater Circuit (Bank 1 Sensor 2)
P0120: Throttle/Pedal Position Sensor/Switch A Circuit
P1400: [Mitsubishi] Manifold Differential Pressure Sensor circuit.
P0443: Evaporative Emission Control System Purge Control Valve Circuit
P1105: [Mitsubishi] Fuel Pressure Solenoid.
P0403: Exhaust Gas Recirculation Control Circuit