How do you fix an evaporative emission control system malfunction OBD code 0441 incorrect purge flow?

Help with my 97 Saturn SL2. SES light comes on at speeds of 50 or higher. I've replaced both O2 sensors. The code reads 20 which is something to do with emissions. Any suggestions? How do you dispose R-134a emty refrigerant container? Will a bad ignition switch cause car not to turn over? What tool is used to check the oil clearance of a plain bearing in a single piece crankshaft? Why is my 2004 Nissan Murano rpm hand going so high at 20 mph? If your brakes fail one of the first things to do? Is it illegal to have a Z on a BC license plate? What should you do when the ignition is locked and you are unable to turn the key on a 1997 Nissan Altima? Should someone with a chordoma brain tumor drive? When charging liquids should be added to the side of the compressor? When you are locating potential hazards you are predicting? Is wd-40 edible? What problems would you expect to have with a 450SL that has been sitting for 4 years? Engine knocks after turning car off? Is AutoZone open Memorial Day? A first conviction for DUI can result in what? Was frank d azar arrested for drunk driving? How much does a tire change cost at a Hyundai dealership? What are the penalties for receiving a DUI? What did some cities build to relieve traffic and congestion on city streets?