P0443
Powertrain Codes
P0443 - FORD - EVAP Purge Control Circuit
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
Possible Causes
- Damage harness or connectors to the Purge Control Valve
- The valve circuit is open or shorted
- EVAP canister purge volume control solenoid valve may be faulty
When Detected
- An improper voltage signal is sent to ECM through the valve.
Description
The EVAP canister purge volume control solenoid valve uses a ON/OFF duty to control the flow rate of fuel vapor from the EVAP canister. The EVAP canister purge volume control solenoid valve is moved by ON/OFF pulses from the ECM. The longer the ON pulse, the greater the amount of fuel vapor that will flow through the valve.