I have a 95 Lexus es300 with 235,000 miles. I bought it in Dec of 2013

What is your question?

the check engine light has been on since the day i bought it a steady light, it throws 3 codes PO170, fuel trim PO340 camshaft position sensor and PO770 Shift Solenoid E I have to get it smogged how do i get the check engine light off so i c an go have it smogged and what needs to be replaced? The car runs fine, starts right up but the exhaust is a little smelly what can i do?