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

Asked by for the 2002 Kia Optima
this means you need to get a complete diag of all codes by a good shop,it may be beyond a diy'er
1 more answer , 1 more comment
Have the engine scanned and post the code, so we can help.
P0455 evap emission leak
P0302 cylinder 2 misfire
P0123 tps
P1505 ?
P1507 ?
What exactly does all that mean