1995 Buick Rivera scan codes P0171 fuel trim lean, P1406 EGR Pintle postion

I have a 1995 buick rivera with 169K on it, I am getting codes P0171 Fuel Trim Lean and P1406 EGR Pintle Postiion Sensor Circuit. Does anyone know what these mean and how I could fix them.
For code P1406 I opend up the EGR and cleaned it out. Would this help? For the P0171 fuel trim lean I am lost as to what needs to be done to fix this. If anyone could help it would be awesome!!

Hey Eric, welcome. In the future try the "search" function, theres lots of great info there.

Try this ....
https://rivperformance.editboard.com/t6354-code-p0171-lean-condition-solved-dirty-maf-sensor?highlight=P0171

... and for your EGR code, often they don't respond to cleaning and just need to be replaced.

Another note.......if your EGR is stuck (which it more than likely is), a P0171 can be set. Fix the EGR first, clear the codes and see if P0171 comes back.