I changed oil sensor in 2001 grand Laredo , moved two grounds over on harness to get to oil sensor easier, put sensor in and put two grounds back next to dipstick and now jeep won't start??

If it is a 4.0 strait six cylinder this is a common problem on them.Mine was located just below the oil filter and is pretty easy to fix.Plan it on your next oil change and it is even easier to change out.Oh just so you know your 4.0 liter engines do make a little bit of noise but are pretty much bulletproof if you just do regular maintence on them.Next time you start it put your ear down by the driver side hood hinge.You will find some tapping noise there it is part of the evap system.If it had no oil pressure you would know it rite away.

the first grand cherokee laredo was in 1992 . it was all jeep sports back then, the blocks are all the same .you will need to use some of the sensors from the old motor, the distributor and oil sending unit and temp sensor. will be no problem. if I can put a ford ranger motor in a mercury sable your swap is easier

Check the "GROUND WIRE(S)" I would inspect all wires that you or your oil changer may moved during the oil change and senosor change.

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Use a de-greager spary to clean out the wiring harness one day before the job,

let the wire harness dry over night.

Next day,have a friend to do the "200 rpm" reving in a outdoor open air area.
Move and inspect wire for "GROUNING" to the metal frame.

Most likely to be near or around the motor mount.

Keep moving the wiring harness until you able to pinpoint the trouble spot.

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Since you had a 1987,plastic connector(s) can be worn or no able to make a secure connection.

Use PB Blaster to clean all sensor tab(s) and connector(s).

I will email you a picture of PB Blaster later.

Do you best to check out these connetors.

you might want to check you cam shaft sensor amd also there is a different sensor under the distutor i had to replace both of these on my 95 jeep grand cherokee laredo

Sit on top of transmission bell housing, you can get to it from under the hood, drivers side on top on transmission, held on with 10mm bolt. unplug harness to sensor, remove bolts, and replace.

P1762 - Governor Press Sensor Offset Volts too LOW or too High
Circuit is monitored continuously while ignition is on and engine is running. DTC sets if the governor pressure is out of range in Park or Neutral for 1.3 seconds. The test must fail 3 times to set DTC.
The following items may be the area of concern:

• Solenoid pack connector 5-volt supply circuit open or shorted to ground.
• Defective PCM.
• Wiring harness and/or connectors defective.
• Governor pressure sensor wiring harness and/or connectors defective.
• Governor pressure sensor ground circuit open.
• Transmission fluid burnt or oil pan contains excessive debris.

APPS Accelerator Pedal Position Sensor is usually integrated to the pedal itself. If it has gone bad you have to replace the accelerator pedal assemble itself. 2 bolts/nuts and disconnect a wire harness.

Throttle Positioning Sensor About 45 dollars and 3 mins to change. Its by the throttle body. JULES

Does it act different when this happens???? If not do not worry about it. It is just the Oil Pump slowing down with the Motor and will not hurt anything. My 600 HP 95' Silverado does the Same thing and it is not a Problem

OIL PRESSURE SENDING UNIT ON MY JEEP GRAND CHEROKEE LAREDO 1999
WHERE IS IT LOCATED AND IS THERE A DIAGRAM OR PICTURE LOCATION FOR IT

ANY SPECIAL KNOWLEDGE TO PUT IN?