Possible causes
– Missing Fuel cap
– Incorrect fuel filler cap used
– Fuel filler cap remains open or fails to close
– Foreign matter caught in fuel filler cap
– Vent control valve harness is open or shorted
– Vent control valve circuit poor electrical connection
– Faulty vent control valve
– Incorrect fuel filler cap used
– Fuel filler cap remains open or fails to close
– Foreign matter caught in fuel filler cap
– Vent control valve harness is open or shorted
– Vent control valve circuit poor electrical connection
– Faulty vent control valve
Tech description
Before replacing any parts, try re-tighten the gas cap and clearing the code. If the cap or cap seal is damage replaced cap and clear the code.
When is the obd code mean?
– The P0446 codes triggered when an improper voltage signal is sent to ECM through EVAP canister vent control valve.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– Possible a noticeable fuel odor caused by the release of fuel vapors
– Possible a noticeable fuel odor caused by the release of fuel vapors
P0446 FORD OBD Code Description