There is no such fuse; the check engine light comes on when the OBD system detects a malfunction or a sensor that is operating outside the pre set perimeters.
You can turn the light off by scanning and erasing the code(s), but that is just an band aide solution; the proper way is to diagnose the reason for the check engine light being on and fix that problem.
SOURCE: 2007 Mercury Grand Marquis required oil weight
If u have a moderate climate, 10W-30W, if cold climate 5W-30W, do not use any heavier weight of oils.
SOURCE: Can someone post a fuse diagram for 1991 mercury grand marquis ?
they don't have diagram that i've seen, my roommate has this car and on page 172 of owners manual it gives the number of what fuse does what,, .. which corresponds to the number on the lid of your fuse panel
SOURCE: 1994 Mercury Grand Marquis Check Engine Light Code 332
its the tube going from the egr valve to your exhaust it have carbon build up and you either have to replace it or get a metal coat hanger and clean it out.
SOURCE: how to replace starter +1993 Mercury Grand Marquis
disconnect battery,,jack car up,,put jack stand on frame,,take starter bolts out,(may not be easy),,take wires off starter,,hoped it helped,,
SOURCE: How to reset Check Engine
You can remove the NEG battery terminal for 10 minutes and it will clear. Or go to Autozone or Oreillys for a free scan, find out why it came on, then have them clear it with their scanner.
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