Engine Light ON (or Service Engine Soon Warning Light),Possible a noticeable fuel odor caused by the release of fuel vapors
P0441 JEEP Possible Causes
EVAP purge solenoid vacuum supply,EVAP purge hose/tube obstruction,EVAP purge solenoid vacuum supply-evap system leak,Faulty Powertrain Control Module (PCM)
P0441 JEEP Description
The Powertrain Control Module (PCM) tests the Evaporative Emission (EVAP) system for the following conditions: – Large and small leaks – Excess vacuum – Purge flow during non-commanded conditions – Fuel Level and Fuel Pressure sensor faults – EVAP Purge and Vent Valve faults The PCM monitors the Fuel Tank Pressure sensor in order to determine the level of vacuum/pressure in the EVAP system. The PCM commands both the EVAP Purge Solenoid and the EVAP Vent Valve ON when the conditions are met in order to apply an engine vacuum to the EVAP system. The PCM commands the EVAP Purge Solenoid OFF once the system has reached a predetermined level of vacuum. This test verifies if a vacuum can be achieved in the EVAP system. Failure to develop a vacuum may be caused by a large leak or a restriction.
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