my car stumbles and check engine light is on on 2002 Kia Optima

I replaced throttle position sensor two months ago and car ran fine no lights now lights back on and car stumbles just replaced again under warrenty and still same problem can someone help

by in Harrisburg, PA on December 03, 2013
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2 answers 1 comment
ANSWER by , December 03, 2013
Have the engine scanned and post the code, so we can help.
COMMENT by , December 04, 2013
P0455 evap emission leak P0302 cylinder 2 misfire P0123 tps P1505 ? P1507 ? What exactly does all that mean
ANSWER by , December 04, 2013
this means you need to get a complete diag of all codes by a good shop,it may be beyond a diy'er