"Service Engine Soon" & Inspection Fail

[tysonkim]

Hi! all

I'v driven for a long time(over 8 months) without any problem
while "service engine soon" light illuminated.
But I have a problem with inspection because of that sign.
There are 3 codes came out,

PO 313 Misfire detected
PO 2096 Bank I Lean
PO 430 ???

I was told that it gonna be $1,000(estimate) for fix and erease it.
Even they don't know exactly whitch parts should be changed so they are
going to replace most part of that related with those codes.
What am I supposed to do???
Mine is 01' X5 3.0