× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Re: Philosophy Behind OBDI VS OBDII MIL Operation
Posted to Technical Discussion Forum on 11/21/2004 14 Replies

OBD1 simply turned on MIL when a hard failure was detected in an emission related circuit,with no regard to affect on emission levels.

OBD2 turns MIL on after detecting a problem in an emission related circuit that could cause vehicle to produce 1 1/2 times ... Login to read more.

14 Replies Received (View Replies)