There may be dirt blocking it. Let it rinse out for a while, check the looks of the fluid. Wiggle the plug while it drains. You may not have to remove it completely to drain.
Hello
Welcome, If you have driven over a month and it has not reset there is a problom with one of the 4 sensors, You will need to have the TPMS scaned to see witch sensor is not working,, Here is a link explainin this in detail http://www.chryslertpms.com/