<br><br>Thank you for that link. I looked up OBD in Wikipedia but a lot of what it said there didn't make sense to me. This article does - *and* it gives an explanation of what "DTC" means, which the Wikipedia article didn't.<br><br>Meg<br>ddwinters said:Yes, that's a good point about OBDII. I hadn't thought of that.<br><br><a target="_blank" href="http://www.aa1car.com/library/mil.htm">http://www.aa1car.com/library/mil.htm</a><br>