P1447 Buick Evaporative Emission Control System Purge Flow Monitor
Possible causes
– EVAP canister purge volume control solenoid valve stuck closed
– EVAP control system pressure sensor and the circuit
– Loose, disconnected or improper connection of rubber tube
– Blocked rubber tube
– Cracked EVAP canister
– EVAP canister purge volume control solenoid valve circuit
– Closed throttle position switch
– Blocked purge port
– Closed throttle position switch
– EVAP control system pressure sensor and the circuit
– Loose, disconnected or improper connection of rubber tube
– Blocked rubber tube
– Cracked EVAP canister
– EVAP canister purge volume control solenoid valve circuit
– Closed throttle position switch
– Blocked purge port
– Closed throttle position switch
What about the obd code?
Under normal conditions (non-closed throttle), sensor output voltage indicates if pressure drop and purge flow are adequate. If not, a fault is determined. Malfunction is detected when EVAP control system does not operate properly, EVAP control system has a leak between intake manifold and EVAP control system pressure sensor.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1447 Buick Description
In this evaporative emission (EVAP) control system, purge flow occurs during non-closed throttle conditions. Purge volume is related to air intake volume. Under normal purge conditions (non-closed throttle), the EVAP canister purge volume control solenoid valve is open to admit purge flow. Purge flow exposes the EVAP control system pressure sensor to intake manifold vacuum.
Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre – Buick Lucerne – Buick Park Avenue – Buick Regal – Buick Verano – Buick Enclave – Buick Encore – Buick Rainier – Buick Rendezvous – Buick Terraza – Buick Riviera