Just recently, I inadvertently removed the yellow doohickey that holds the 2 x 10 amp fuses in the interior fuse bank of my 2002 WJ Jeep Grand Cherokee Laredo. I checked the fuses and they were ok so I inserted the fuse holder back in.. Low and behold the seatbelt and airbag light came on and stayed on. After several quick fixes etc to get the lights to go out, I finally returned to the fuse holder and discovered that A. You need to squeeze in the tabs to get the fuse holder out and B. the fuse holder when being re-inserted will not automatically clip in... you have to squeeze the tabs again to press the fuse holder fully home. I started the old girl up again and no more lights.
SOURCE: 2002 jeep power windows and door locks stopped
SOUNDS LIKE YOU HAVE BROKEN WIRES BETWEEN DRIVER'S DOOR AND BODY AT A PILLAR..PULL RUBBER BOOT FROM BODY AND DOOR AND INSPECT WIRING HERE
SOURCE: 2002 Jeep Grand Cherokee Lardo misfiring
You say you changed the cam sensor. A1391 code is a crank sensor on the top of the trans. bell housing.
SOURCE: 2002 jeep cherokee laredo
My 98 Jeep Grand Cherokee had the same problem. Over heated when standing still. Took it to dealer and they could not find any problem with cooling fan. After doing my own investigation I found out that the electric cooling fan would begin to seize up after about 1hr. of operating. (gets hot)
The dealer would look at fan and see that it was running and think its ok. The problem is, it wasn't running fast enough.
I have a relay on the right side of front fender and jumped the fan to stay on with motor off. (must know what your doing). After about 1hr. fan started slowing way down. Returned it to dealer told them what the problem was. They were not smart enough to jump the relay so they put a couple hundred miles on it even though i told them it works OK when moving. Make sure you tell dealer to use the relay to jump.
Replace cooling fan motor. Works great
SOURCE: 2002 wj jeep grand cherokee p1756
The governor pressure sensor is the most likley cause however an inspection of fluid or debris in trans pan would be a good idea to make sure there's nothing excessive in it. Attached is a list of possible causes however the senor would be the most common.
POSSIBLE CAUSES
SOURCE: How do you program a 2002 Jeep Grand Cherokee FOB?
if you have an original working fob and your owner's manual,it will explain procedure,otherwise will have to go to dealer to be programmed
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