1997 Ford Explorer engine codes P0171 and P0174?

The engine codes P0171 and P0174 for a 1997 Ford Explorer indicate that the engine is running too lean on both bank one and bank two. This typically points to issues such as a vacuum leak, a dirty or faulty mass airflow sensor, or fuel delivery problems like a weak fuel pump or clogged fuel filter. It’s important to diagnose and address these issues promptly to avoid potential engine damage and ensure optimal performance. Checking for any intake leaks and inspecting the fuel system components are good starting points for troubleshooting.