The correct diagnosis for the code is “Evaporative Emission Control System Control Valve”. Most likely the problem is the Canister Purge Assembly. This assembly connects the intake manifold to the charcoal canister and the assembly is made up of hoses, a valve and a sensor. On your 1997 Ranger, it is located near the front of the engine compartment on the driver’s side. The canister is right behind the driver’s side headlight. Apparently, if there are any cracks in the hoses, or if the valve or the sensor wear out, this will cause the check engine light to come on and return the P1443 code. The part numbers for the canister purge solenoid/flow sensor assemblies depending on your engine are:
F57Z-9C987-AB Canister Purge Solenoid/Flow Sensor
Assembly - 2.3L
F57Z-9C987-CA Canister Purge Solenoid/Flow Sensor
Assembly - 3.0L
F57Z-9C87-BA Canister Purge Solenoid/Flow Sensor
Assembly - 4.0L
The assembly will cost between $70 - $100 depending on the exact part number that you need. It will only take 5 or 10 minutes to install the part, and it is fairly simple to do. The check engine light should clear itself after a few driving cycles.