P0171. Ill disconnect and reconnect the battery here in a bit and give you an update. thanks so much, everyone!

So, for the first time in 20 years I let my car run out of gas. I put gas in it, and its been driving fine but the check engine light is on. I worry I may have screwed up the fuel filter or fuel injectors. The check engine reading I got from Auto Zone indicated the check engine light does have somet...