2001 Buick Century wont start after cleaning air filter

HeatM1serHeatM1ser Member Posts: 1
edited July 2019 in Buick
Hi, and thanks for taking the time to read this. My grandmother just gave me her 2001 Buick Century. The car was starting just fine, but then when I took the air filter out and cleaned it, then put it back, the car wont start now. It just cranks and cranks, but wont turn over. I took the filter out and re-sat it and attached the hose once more, but that didnt do anything. The fuel gauge doesnt work, so I thought maybe it had simply run out of gas. Filled it with 2 gallons of 87 and tried to start the car again, but no luck.

Before cleaning the air filter I bought a cheap OBD2 scanner, which reveals a P0135. I ran the OBD2 scan again and now its also showing a P0446. What would you guys suggest I try to get the car started?
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