Service 4WD System error appears and vehicle does not start. 2011 Jeep Grand Cherokee

SOURCE: 1995 Jeep Grand Cherokee keeps flashing "Service 4WD switch".

You will probably find the oil level in the exchange box is low and the sensor is activating.

SOURCE: 2005 Jeep Grand Cherokee (HEMI) Service Electric Brake System

Problem is a faulty Steering Angle Sensor (part of Steering Module) located in steering column ...replacement part $600.00.

SOURCE: crankshaft sensor located 98 jeep grnd cher 4wd 6cy

it is located at the back of the engine on top of the transmission bell housing,the plug runs over to the passenger side of the engine bay and it comes out from behind the engine,you can actually get your hand on the sensor itself from under the hood on the drivers side,and i believe its a 13mm bolt holding it in,the new sensor will have a sticker on the end of it...leave it there,it is used for correct spacing between the sensor and the flywheel,hope this helps

Testimonial: "Everything was just like you said but as a not atleast for my jeep it is an 11mm not 13mm. Works great so far (keep fingers crossed) "

SOURCE: my 93 jeep grand cherokee service 4wd switch is

Hey there, The driver info center in the 93 grand cherokee's is notorious for this message. This switch is on the transfer case and its only purpose is to tell that display what 4 wheel drive mode you are in (eg. 2 wheel, 4 wheel high, 4 wheel low, etc.) This can mean the switch bad but is USUALLY cause by a short in the display module itself. This will not affect anything on your Jeep. It is merely for driver information only. This is a very common problem and if you have a 93 in which the display is working at all your are lucky. They are very bad about going completely out over time.

SOURCE: perform service jeep grand cherokee 2005

Actually the newer cherokees are a little more complicated, it's not a reminder for an oil change. It is for an emssions service that should be performed according to the dealer. Here is the rest procedure

Turn ignition to on position, but do not start.
Depress brake pedal fully twice.
depress excellerator very slowly twice
Turn ignition off & that will reset the perform service indicator.
I am mechanic & we are getting frustrated because the dealers do not want to release this info to anyone, they want your money! Can you believe if you did not get them to perform the service they charge you a 1 hour shop rate??