Diagnostic Trouble Code (DTC) P1443 indicates a failure in the EVAP canister purge valve circuit. The Evaporative Emissions (EVAP) Canister Purge (CP) valve controls the flow of vapors from the fuel vapor storage canister to the intake manifold during various engine operating modes. It may need nothing more than a good cleaning, vacuum hose connected or that is leaking, or may need more. I suggest you seek out the services of a good mechanic. Do not just throw parts at this. The code does not mean that any part needs replacing. It just means the EVAP system is being effected.
Code P1443 is idle air Control (IAC) valve Speed fault
Trouble code P0420 means:Catalyst system efficiency below threshold
Trouble code P0118 means: Engine Coolant Temperature Circuit High Input Trouble code P1443 means: Evaporative Emission System Control Valve (low/no flow) Trouble code P0301 means: Cylinder 1 Misfire Detected Trouble code P0306 means: Cylinder Number 6 Misfire Detected
Trouble code P0171 means: Fuel System Too Lean (Cylinder Bank 1)
Trouble code P1409 means: EGR Vacuum Regulator Solenoid Circuit
The above is copied and pasted from "The Thunderbird And Cougar Owners Club of America" "Straight from the service CD (mostly, I added a descriptor after the code) P1443=A problem with the EVAP purge flow system Continuous Memory Diagnostic Trouble Code (DTC) P1443 indicates an incorrect evaporative system purge control valve flow. Possible causes: -- Obstructed, open or cracked hoses between EVAP canister purge valve and intake manifold. -- Damaged EVAP canister purge valve. -- Damaged PF sensor."
The code P1443 for the 1996 Ranger means that there is a problem with the EVAP Pressure Sensor. The real culprit might be the Vapor Canister Purge Valve since the EVAP Pressure Sensor rarely fails. The VCP Valve is around $60. Before purchasing this part, check all hoses around it for leaks.
P1443 EVAP System - Tank Cap Missing Mostly it may be damaged. usually appears with code P0455
Evaporative Emission Control System control valve malfunction. You need a new evap control surge solenoid valve.
P1443 Evaporative Emission Control System - Vacuum System - Purge Control Solenoid or Purge Control Valve fault Loose or defective gas cap will cause this code.
Trouble code P0301 means:Cylinder 1 misfire detected
Trouble code P1451 means: Evaporative Emission System Vent Control Circuit