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DTC - Diagnostic Trouble Codes information

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.