The P0443 code on your 2020 Ford Escape indicates a malfunction in the EVAP purge control valve circuit. This code points to an electrical problem with the purge valve rather than a leak or flow issue.
Purge Valve Circuit Function
The purge valve is an electronically controlled solenoid that opens to allow fuel vapors to flow from the charcoal canister to the engine intake. The PCM controls the valve by providing ground signals. P0443 indicates the control circuit isn't functioning properly.
Escape Engine Options
The 2020 Ford Escape offers multiple engine options including 1.5L turbo, 2.0L turbo, and 2.5L hybrid. All use electronically controlled purge valves as part of their EVAP systems. The circuit operation is similar across variants.
Circuit Malfunction Causes
The purge valve solenoid may have failed electrically. Wiring between the PCM and valve may be damaged. Connector corrosion affects circuit integrity. The PCM driver circuit may have failed (rare). An internal short or open in the valve prevents proper operation.
Diagnostic Steps
Use Ford IDS to command purge valve operation. Test for voltage at the valve connector when commanded on. Measure solenoid coil resistance against specifications. Check wiring continuity from valve to PCM. Inspect the connector for corrosion or damage. If wiring tests good, the valve likely needs replacement.