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

Douglas Wyczalek

It's on the left trunk hinge inside trunk


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 out of 1 people think this is helpful.

so what is the ECU


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.

Your Answer

Add photo

Related Questions

Grand Marquis

Looking for a Used Grand Marquis in your area?

CarGurus has 2,557 nationwide Grand Marquis listings starting at $1,300.


Search Mercury Grand Marquis Questions

Mercury Grand Marquis Experts

#1 Tracy Hooks
Tracy Hooks
Reputation 4,850
#2 kbro
Reputation 1,910
#3 Js08016
Reputation 1,440
View All

Related Models For Sale

Used Ford Crown Victoria"
11 Great Deals out of 1,654 listings starting at $1,950
Used Lincoln Town Car"
50 Great Deals out of 2,364 listings starting at $1,542
Used Chevrolet Impala"
938 Great Deals out of 35,697 listings starting at $1,500
Used Dodge Charger"
646 Great Deals out of 29,674 listings starting at $2,275
Used Ford F-150"
3,271 Great Deals out of 216,650 listings starting at $1,500
Used Honda Accord"
1,263 Great Deals out of 78,694 listings starting at $1,400
Used Cadillac DTS"
85 Great Deals out of 1,935 listings starting at $1,995
Used Ford Mustang"
737 Great Deals out of 41,065 listings starting at $900
Used Ford Taurus"
363 Great Deals out of 23,103 listings starting at $1,400
Used Toyota Camry"
1,608 Great Deals out of 98,371 listings starting at $895
Used Chrysler 300"
578 Great Deals out of 20,785 listings starting at $1,490
Used Chevrolet Tahoe"
1,076 Great Deals out of 36,075 listings starting at $1,700

Used Cars For Sale

2010 Mercury Grand Marquis LS For Sale
7 Great Deals out of 117 listings starting at $3,299
2009 Mercury Grand Marquis LS For Sale
5 Great Deals out of 118 listings starting at $2,995
2008 Mercury Grand Marquis LS For Sale
4 Great Deals out of 135 listings starting at $2,900