having issues

[biglaz007]

well my car had a really bad irratic idle causing it to shutoff i changed the maf,iacv and checked for vac leaks. it idles around 1000-1200 and hasnt shut off as of yet . the car is still throwing some other codes a hard code that i cant erase p0505 and 2 others p1400 and p0325

i know one of them is the knock sensor but how or what do i need to check to fix the other codeany input is greatly appreciated