Can anyone help me with car engine obd car codes?

I own a 1998 Ford Contour Sport V6 engine. It has 52,354 original miles. But I am getting a code it's P0174 says bank 2 too lean. ( is that due to one thing or multiple things)? Also B1600 Anti theft module ignition key transponder And the last one is B1601 signal not received. I had someone do the OBD thing... show more I own a 1998 Ford Contour Sport V6 engine. It has 52,354 original miles. But I am getting a code it's P0174 says bank 2 too lean. ( is that due to one thing or multiple things)? Also B1600 Anti theft module ignition key transponder And the last one is B1601 signal not received. I had someone do the OBD thing to my car and he wrote this all done in paper. I included a photo with the original paper he gave me
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