2000 mercury sable emission light comes on - 2000 Mercury Sable

Question edited for clarity and typo.
Question moved to sub category.

It is all in here.

2000 Mercury Sable Car Stereo Wire Colors and Locations

https://www.the12volt.com > installbay > stereodetail
2000 Mercury Sable Stereo Wiring ; Ground, Black/Light Green ; Illumination, Light Blue/Red ; Dimmer, n/a ; Antenna, Left Rear ; Front Speakers, 5" x 7" Doors.


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It means that the Transmission control module has detected a fault in the operation of the transmission or its controls. You now need it scanned to see what fault code or codes was set in the memory of the TCM.

Mercury Sable 2000 to 2005 Factory Service SHop repair manual

for the easy solution download the pdf file

If it is on the engine, the diagram is on the
federal emissions label under the hood

indicates a problem. have someone scan it

Vacuum leak at intake manifold,vacuum leak
at injector "o"-ring,valve issues

i would check the main fuse that runs the fuses box

P0452 is a loose gas cap I think. Maybe your EVAP canister purge valve is stuck open causing a vacuum leak at idle/low speed. It should only open at cruising speeds.

yes about the upper intake and the only way i know how to check the coils is with a engine anilyser or if the check engine light comes on then you can have the codes pulled and that will tell you which cylender is missfiring this engine has a indevidual coil for each spark plug so thares 6 of them and thay slide right down over the sparkplugs

Is the radiator fan working?
Sounds like you have a major problem.