Originally Posted by whopper

FYI: most auto Parts stores will use an OBD Code reader and download the codes for free - of course they are looking to sell you the parts needed to do the repair (which is a fair deal). However, they can easily misinterpret the code downloaded.

So our typical advice is to get the ACTUAL code (ie: p0303), not the verbal description they may give you (ie: engine misfiring). Then post the actual code here - or use the search tool at the top of the page and search for the code here.