OBD2 GUIDE covers all aspects of the OnBoard Diagnostic II systems on late model domestic and import vehicles. Topics covered include: * Basic Operation of OBD II on 1995 and newer vehicles * OBD II system monitors (what sensors & systems OBD II watches, enable criteria for running self-tests, & drive cycles) * Basic OBD II troubleshooting, including general tips and guidelines * OBD II troubleshooting help by general type of code or symptom * Lists possible causes of specific codes, what to check, what PIDS to look at with your scan tool and more. * Includes helpful information that can save you hours of frustration and chasing dead ends! * Mode 06 Diagnostic overview (what Mode 06 is and how to access and use it). * OBD II emissions testing (what is required, tips on how to pass a plug-in OBD II test)