[BNaylor]

For your model and year GP it is a Evaporative Emissions Control System Incorrect Purge Flow. The PCM will detect a purge solenoid stuck closed by monitoring the Evap. Purge Vacuum switch state when the Evap Purge solenoid duty cycle is > 85%. The switch state is currently low (closed) therefore the P0441 triggers.

Check the vaccum line running from the charcoal cannister and vent solenoid to the purge solenoid located at the engine. The purge solenoid is located in front of the front fuel injector rail and fed vacuum from the throttle body. Also, check the electrical connection at the purge solenoid. You may have a flaky purge solenoid.