Here’s the breakdown of each pin’s purpose. Each of the 16 pins has a different purpose with the OBD-II port. The OBD scan tool is connected to the port to read the codes.(However, in some cases with cars between 1995-2005, they can have a plug that looks like the one above but cannot be accessed easily as they did not have the full OBD2 protocol.) If it has a different-looking plug, then it was made before 1995 and is OBD1. If yes, then your car is OBD2 (And might be fully OBD2 compliant). Typically, you'll find the port near or under the steering wheel column. You'll want to connect your OBD2 scanner to the OBD port, which is the same spot a state emissions inspector will use for your annual car checkup. ![]()
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