Solving the following Error Codes

The codes you have metion is for fuel injection miss fires. and lean condition . These codes most likely mean you need to start with a tune up , and fuel injection cleaning . The oxygen sensor are very common problem with the po171,po174 code. The other common problem with the codes after a tune up is done is the intake manifold gasket is leaking .
I would take the vehicle in to a mechanic for a tune up and then demand the mechanic clears all the codes . You can take the vehicle back and drive it for a few weeks. IF the codes come back then have the vehicle recheck for the oxygen sensors or intake gaskets .