What makes using OBD2 system, so much better than OBD1

67Dart273 said
RE is controlled by the "main" computer. Also be careful, don't know about all makes and models, I had a GM car was a "half way in between" OBD1 and OBD II half the scanners on the market would not read the damn thing. I think this all happened around 95--ish for GM, don't know about Chrysler
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96 was the first year for OBD2. Mopar had limited information though. I hook the scanner up to my 96 Dakota and don't get much. Full blown OBD2 is a very involved system and not for the amateur. Every computer and module has a input and output. ECM, BCM, Anti-lock, TCM and the like.