How can I find the keyless door lock code for Grand Marquis 2009?

Asked by Sep 20, 2014 at 04:36 PM about the 2009 Mercury Grand Marquis LS

Question type: General

Bought 2009 used Grand Marquis recently.  No keyless door code available.

6 Answers

The factory default code is stored in the ECU and can be retrieved with a high-end OBD scanner

360

It's on the left trunk hinge inside trunk

1,255

It's not in the trunk on mine, I've read that it's on the lock module inside the driver's door. I haven't removed the panel to get to it yet.

1 of 1 people found this helpful.
160

so what is the ECU

1,255

I think the Electronic Control Unit is inside of the driver's door, and should have the code on it. A dealer can retrieve your code with the VIN, for a fee.

Thanks to all. Not located on door panel or inside trunk. Had dealer to reset it with new one. $40+ fee from manufacturer, they said. Works great now.

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