OBDII March 09, 2016, 06:55:40 pm Yahoo Message Number: 159277All LDs built after 1996 have an On-Board Diagnostics II (OBDII) system. This system can be accessed by the tech-savvy owner to aid in diagnostic troubleshooting. Ford has compiled an OBDII summary for every year vehicle since 1996 that is available for free. The OBDII summary for your specific vehicle year can prove to be very helpful, especially if you can access Mode 6 data.That listing can be found here...https://www.motorcraftservice.com/freeresources/obdhttps://www.motorcraftservice.com/freeresources/obd.Chuck Myers 97RB @Hartford IA...tracking down a pesky engine stumble at load.https://www.motorcraftservice.com/freeresources/obd