DTC P0443: Evaporative Emission System Purge Control Valve Circuit
WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, 2011 Ford Fusion, 2010 Mercury Milan, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
P0443 - EVAPORATIVE EMISSION SYSTEM PURGE CONTROL VALVE CIRCUIT
| Description: | The powertrain control module (PCM) monitors the state of the evaporative emission (EVAP) canister purge valve circuit output driver. The test fails when the signal moves outside the minimum or maximum limit for the commanded state. | ||
| Possible Causes: |
|
||
| Diagnostic Aids: | To verify normal function, monitor the EVAP canister purge valve signal parameter identification (PID) EVAPCP and the signal voltage (PCM control side). With the valve closed, the EVAPCP PID indicates 0% duty cycle and voltage is approximately equal to battery voltage. When the valve is commanded fully open, the EVAPCP PID indicates 100% duty cycle and a voltage drop of 3 volts minimum is normal. Output state control (ESC) may be used to switch output on/off to verify function. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to PINPOINT TEST HX . | ||