Friday, October 24, 2008

Scan Tool Diagnostics

Well, it's that time of year again. Time to run the family's 1997 people hauler to the inspection station and run it through. You're not really looking forward to it because the Check Engine Light (MIL) came on yesterday. But you go on out and pull into line and wait your turn.

Well, it failed inspection.

Your vehicle has the second-generation OBD II diagnostic system. OBD II replaced the first-generation OBD I in 1994. OBD II is used by all automakers and is Federally mandated. The problem that DIY's run into is that you can no longer get diagnostic trouble codes (DTC's) by watching the blinking MIL as you could with older computer controlled engines. Taking the vehicle into a shop that has the proper tools to diagnose the problem can be expensive, often $100.00 or more. The other option is to learn OBD II and do it your self. The thing is, you're going to need a scan tool.

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