Emissions

Ken, I replaced the purge solenoid valve on my dodge caravan. I took off the front charcoal canister and checked to see if there where any loose pellets. Canister looks fine. I also blew air through the line that goes to the purge solenoid valve. Seems to be clear. I also blocked off one of the ends of the vacuum line and did a vacuum test to check if it had any leaks. It easily held fifteen pounds of vacuum for over fifteen minutes. So no leaks in the line. Two days later check light came on with the 0441 code. I looked up this code on the internet and it says that code could be just about anything even a bad ECM module. I do not like this vehicle. Now the check light after I reset the check light will more then likely not come on again for two weeks or so but it will come on again that I know. Any ideas you can give me will be appreciated. By the way my fan switch is still working on all speeds thanks to you showing me how to fix the wiring. Luckily I live in Florida and do not have to past a emissions control like many other states have. One other thing my scanners stores codes that I have had like 0455, 0442 and so on but never stores the 0441 code for some reason. Also, I have tried other code scanners when the check light is on with a 0441 code and they also never read there is a problem with the check light. The only thing that ever shows the 0441 code is when I turn my ignition on there times within five seconds and the code shows on my trip meter and the light is on. I really get some weird problems. My scanner when I run a I/M readiness test shows X's by Evap, EGR catalytic converter, o2s, and Hrt. Do I need to run the vehicle through a drive cycle to see if these go away?I really do not know. There are no codes found or stored now and the check light is off. I used this scanner (Image added) to run the tests which seems to work very good.