Not only is shot-gun changing of parts walking around with a blindfold on and your wallet hanging out in a subway, but even after you have the codes , it still doesn't mean you have identified a faulty part .. it means the computer has detected a fault in a SYSTEM... broken wire , leaking hose , unplugged sensor, etc, etc ,.etc...

Get the codes .. period.. then check out the sytem the code is DIRECTING you to..
If you saw how many codes can trigger a CE lamp, you would not bet on anybodys past CE lamp rectifying part change, believe you me....
You can get code lab-top interfaces that do the job for as little as $75...
and after you get the codes , post back here and you will then get some experienced,analytical direction/answers..