11th gen (P221), 2004-2008
Key reference: 164-R0475
Diagnostic port location (OBD)
Illustrative — for orientation only.
Under the dash on the driver's side, directly below the steering column and slightly to its right, above the pedals and roughly level with the driver's right knee. The 16-pin connector faces down, so you look up under the lower dash edge with a torch to see it. Same position on every 2004-2008 cab (Regular, SuperCab, SuperCrew) and trim; US trucks are left-hand drive only. Fleet trucks sometimes have the connector unclipped and hanging, or a telematics box plugged into it, so trace the harness down from under the column if it isn't where you expect.
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