Car starts here and there and then stopped.

What is your question?

Turn the key and you can here the engine trying to start. It started this morning but after I turned it off it wouldn't turn back on and if it did it took 10 + tries. But now it wont start at all. You can here the fuel pump running. I used my obd2 scanner and only got a 02 sensor code. P0141. Any ideas on what to check to see whats wrong with it?