it's computer is at zero miles to service, you can take it to a dealership to reset it or if you look in the manual it will tell you how. Usually it is holding down both the select and set button at the seame time for about ten seconds.
I have a 1997 Grand Cherokee, and my key fits both the door and the ignition.
A 1997 Jeep Grand Cherokee has one ignition coil.
Need removal and installation instructions for an ignition lock cylinder -- 1999 Grand Cherokee Limited?
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The 2002 Jeep Grand Cherokee ignition key brain box is located behind the dashboard. The brain box will be on the drivers side of the dashboard.
The dealer can, and some locksmiths.
there is a coil on each plug
The coil is on the passenger side of the engine
Not sure if this helps, but the book I have on my 1996 Jeep Grand Cherokee says that their are 2 of these sensors, I have not had the time to look for the second one. I have the same problem.
Ignition or fuel loss
It is undernieth the dash on the drivers side. It is tucked up preaty far but a secret to finding it is that it is right next to the thing that beeps when your door is open with the keys in the ignition. It is round and silver and there are two of them that are identicle. One is for your four way flashers and the other is for your turn signal.
Watch this video: http://www.youtube.com/watch?v=reonxApWkVU