Ford Repair: 2001 Ford Focus engine codes, tight connections, test light

Question
I have a check engine light on, so I had my codes downloaded.  B2159-csm,B1359-hec,P0460-pcm,P1246-pcm,B1932-ecs.  I know the know the basic meaning for each code, but I need a more laymen explanation on what to look for or source out to fix the problems

Answer
always check powers and grounds on engine and body for clean tight connections-with this many varied codes you probably have a connection problem-short or computer before getting to deep in this remember on later model vehicles even touching the wrong wire with basic test light can take out a computer or module so you may want to use a voltmeter with 10 megaohm protection. i would have it checked by a reputable garage or dealer because there is a good chance something will need programmed before its over.