OBD-II compliant: 

  • Cars and light trucks built and sold in the United States after January 1, 1996 were required to be OBD-II equipped.

J1939 compliant: 

  • Most diesel engine manufactured vehicles or equipment are J1939 compliant 
  • The industry standard for most heavy-duty trucks and buses

If you are unsure whether your vehicle is OBD-II or J1939 compliant, check your vehicle manual, research online, or consult with your dealership to confirm compatibility.