PO441
#2
09-23-2007 | 02:50 AM
Champion
Joined: Mar 2004
Posts: 2,703
Likes: 2
From: Bremen, GA.
RE: PO441
Since you didn't say what year you truck is,,, This info is from a '02 5.9L
Symptom:
P0441-EVAP PURGE FLOW MONITOR
When Monitored and Set Condition:
P0441-EVAP PURGE FLOW MONITOR
When Monitored: With engine temperature greater than 170° F, fuel control in closed
loop, engine idling for 2 minutes, no low fuel, MAP less than 15.7 inches mercury and
barometric altitude less than 8,000 feet.
Set Condition: After having passed the Leak Detection Pump (LDP) test, no air flow
through the evaporative system is detected by the EVAP monitor.
POSSIBLE CAUSES
EVAP CANISTER
VEHICLE HISTORY AND SERVICE BULLETIN INVESTIGATION
WIRING HARNESS INTERMITTENT
EVAP PURGE HOSE (CANISTER TO FUEL TANK)
EVAP PURGE HOSE (SOLENOID TO CANISTER)
EVAP PURGE SOLENOID VACUUM SUPPLY
EVAP PURGE SOLENOID (LEAKY/STUCK OPEN)
EVAP PURGE SOLENOID (STUCK CLOSED)
