Dodge Neon Issues

I have 2003 Dodge neon 2.0. I was
driving on the high way when the car
started losing power. Rough running,
little to no power, harsh shifts,
flashing check engine light. When
pulled over the check engine light
would stay solid. Once driving again
the acceleration was very slow with
spurts of speed. Roughly running,
harsh shifting and eventually it died
and crank no star. Tow truck towed it
back, but now it starts and drives.
The only codes saved in the check
engine light is P0171 bank 1 fuel lean
and P0706 check shifter signal. Has
anyone had this issue before or any
guidence on testing certain
components.