2004 freestar engine codes p0141-p0161 how tofix?

The engine codes P0141 to P0161 on a 2004 Ford Freestar indicate issues with the oxygen sensors, specifically related to heating elements in the sensors. To fix this, first, inspect the wiring and connectors for damage or corrosion. If the wiring is intact, you may need to replace the faulty oxygen sensors in the bank indicated by the codes. After replacement, clear the codes and monitor for any reoccurrence.