P0441 OBD Trouble Code

Evaporative Emission System Incorrect Purge Flow

EVAP Purge Flow Monitor Fault Conditions

Engine running in closed loop, ECT sensor over 170°F, engine at idle speed for 2 minutes, Low Fuel not on, MAP sensor input under 15 7" Hg, altitude less than 8000 ft , PTO not enabled, then the PCM detected that no airflow was present through the EVAP system in the test period Refer to Monitor Test, code repair chart to test the code Note: The stricter EVAP purge flow test is used to verify the EVAP system functionality on vehicles with the LDP

EVAP System No Flow During Purge Conditions

No PCM codes set, IAT input at 50-158°F, ECT input under 237°F, the difference between ECT and IAT under 18°F, BARO input over 73 kPa, engine speed at 900-5000 rpm, throttle angle at 2 5-40%, Purge PWM over 85%, then the PCM detected that the EVAP vacuum switch was closed for 2 seconds with Purge enabled

Evaporative emission (EVAP) canister purge system - flow malfunction

Wiring, EVAP valve, hose leak/blockage, canister, BARO sensor, MAP/BARO switching valve, ECM