Where Is the Check Engine Plug in a 1997 VW Jetta?

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Jettas manufactured in 1996 through today include an on-board diagnostic computer to monitor engine and emissions performance. You can read a trouble code from this computer by connecting a scanner to an interface plug.

OBD System

  • The Clean Air Act of 1990 requires 1996 and newer vehicles sold in the United States to have an on-board diagnostic computer. When the OBD detects a problem, it illuminates the "check engine light" and stores a diagnostic code in its memory. You can read this code with a scanning tool.

Standard Plug Location

  • Vehicles in compliance with the OBD-II standard have interface Data Link Connector plugs. The location of the DLC -- "check engine plug" -- varies. In many vehicles, it is beneath the dashboard on the driver's side, within a foot of the center of the vehicle.

Alternate Locations

  • In some imports, the interface plug is behind the ashtray or a panel on the lower left hand corner of the dashboard. Consult the Owner's Manual if the plug is not in one of these three locations. The National OBD Clearinghouse maintains a database showing plug locations by maker, model and year.

1997 Jetta

  • The 1997 Jetta DLC plug is behind a panel on the dashboard, right of the ashtray and above the lighter socket. Remove the ashtray completely and slide the panel left to expose the plug.

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