With older models, results like this have typically been from installation issues. So letting the mechanics who installed it take a look would likely help!
Only other issues prev. seen were with cheap units that had the wrong size tube for the MAF (NOT k&N), MAF installed backwards, MAF dirty from installation or over oiled filter (not likely from pre-oiled unit).
Occasionally something isn't tightened up accidentally, or a hose comes off by accident - those are things you might see yourself with a quick look....
P.S. - Nearby items may have been disturbed during installation, so look around the WHOLE area for possible issues. Intake tract connections in particular given the "code" you got!
Last edited by sailor; 03-17-2013 at 05:02 PM.