So my Check Engine light has been on for the past couple days and I decided to take it to Autozone to get it checked out because they check your Check Engine light for free. So they hooked up there device to my truck and they said My ERG was dirty. Now I don't have a clue what the ERG is. Anyone know? And how may I clean that out? Maybe lead me on to a how to..?
Thanks everyone for helping me out.

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-2001 Ford Ranger XLT Supercab--3.0L V6--101698Miles--KENWOOD 6" X 8" SPEAKERS--Air Box Mod--Black Crystal Headlights/ Corner Lights --Thrush welded Glasspack Muffler--P235/75r15 BF GOODRICH Rugged Terrian--- PNW Crew