CarMD is designed to work on all 1996 and newer vehicles driven in the U.S., with on-board diagnostic second generation (OBD2) technology. This includes cars, trucks, minivans and SUVs – foreign and domestic. It also includes the newer hybrid vehicles. And beginning in 2010, it covers heavy-duty trucks and vehicles.
To see if your vehicle is OBD2 compliant, look for a sticker that says OBD-II or OBD2 under the hood, or in the vehicle's service manual.