codes help! 6 codes... whats the fix?

[FlyingGuy]

had a friend check my codes with his handheld obdII, sorry if its not in "VAG-COM" format. this is what i got:

-------------------------------------------------------------------------
16805.p0421-warm up catalyst bank1. efficiency below threshold
16815.p0431-“ “ “ “ bank2 “ “ “ “ “
17521.p1113-bank 1, sensor 1. internal resistance too large
16826.p0442-evaporative emission system: leak detected (small)
17535.p1127-bank 1 mixture adaptation (mult): system too rich
17964.p1556-turbo/supercharger boost sensor (A) circuit: contr

-------------------------------------------------------------------------

now, i suck at this stuff. tried searching and this is what i found out, correct me or add to it if im wrong. i plugged the codes into a yahoo/google search. this is where im getting my info, different forums and such.

-first 2 are cause im running test pipes
-3rd one is a bad o2 sensor, front driver side (?)
-4th is loose gas cap sometimes, or because the traction control light came on
-5th i found stuff that said possible cracked exhaust to messed up MAF
-6th is a boost leak (?)

[phit]

cat faults there are adaptors you can buy to fake the rear o2's this will eliminate cat faults. front o2 replace it. evap fault completly unrelated to traction control light poss. gas cap loose or your purge valve could be stuck open, run the test with vag engine basic setting 070, if system passes test just clear the fault. if it fails, pull your purge valve off carfully because you want to tap the inlet of the valve to see if there is carbon in there if there is you need to replace the carbon canister. mixture fault check engine mvb 032 field 1&3 show idle 2&4 show cruise. limit -7 to+7 this will let you know if problem is at idle or cruise it maybe related to boost leak you last fault. let me know what you find good luck

[FlyingGuy]

thanx for the help

Now, I've never vag myself. I got an obd2 usb cable from a buddy. I went to download vag-com and there were different ones to download. Not sure which one.

I'm a noob

[phit]

704.1, I'm not sure if thats the right. I don't use VAG-COM. let me know if that works.