On the cell, so excuse any misspellings.
Car started bucking/losing power. Pulled into gas station and refilled, checked oil and obd2.
Code p0420.
Left the car parked for 8 hours. Came back to it.
When running sounded like a tractor.
Smoke white coming from rear of motor.
Car drove like shit, to speed maybe 30 with the pedal down. Had to move it from where it was parked.
Checked obd2
P0420
P0300
Barely idles