Oil Pressure Light - JeepForum.com
 
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post #1 of 9 Old 06-26-2015, 02:45 PM Thread Starter
jeepkjlife
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Oil Pressure Light

Hi, I have a 2006 Jeep liberty (kj) and every time I try to start the vehicle after sitting for 20 minutes or more, or when the engine cools down, the oil pressure light comes on ( the red light that looks like and oil container). if i start the vehicle, turn it off, and start it again the light turns off. The jeep runs smooth and there is no loss of power when i drive it around. I changed the oil right after I saw the light turn on and the light when off for about 1.5 hours they came back on. I think its the oil pump is going bad, or the sender is bad but Im not sure. If you can help me that would be AWESOME! Thank you!!!

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post #2 of 9 Old 06-26-2015, 06:49 PM
02blue
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Wouldn't hurt to have the oil pressure tested just in case but I'd bet it's just the sensor. I'd change the sensor first with a Mopar replacement. Sensor is just above the oil filter and they do tend to leak and fail with time.

"Hey, ya never know til you try." Kurt Russell-Big Trouble in Little China
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post #3 of 9 Old 06-29-2015, 07:01 AM
JeepCACares
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Quote:
Originally Posted by jeepkjlife View Post
Hi, I have a 2006 Jeep liberty (kj) and every time I try to start the vehicle after sitting for 20 minutes or more, or when the engine cools down, the oil pressure light comes on ( the red light that looks like and oil container). if i start the vehicle, turn it off, and start it again the light turns off. The jeep runs smooth and there is no loss of power when i drive it around. I changed the oil right after I saw the light turn on and the light when off for about 1.5 hours they came back on. I think its the oil pump is going bad, or the sender is bad but Im not sure. If you can help me that would be AWESOME! Thank you!!!
jeepkjlife,

As per the owner's manual:

Oil Pressure Warning Light

Shows low engine oil pressure. The light will come on and remain on when the ignition switch is turned from the OFF to the ON position, and the light will turn off after the engine is started. If the bulb does not come on, have the system checked by your authorized dealer.

If the warning light comes on and remains on while driving, stop the vehicle and shut off the engine. DO NOT OPERATE THE VEHICLE UNTIL THE CAUSE IS CORRECTED. Also, a single chime will sound.

Top Care Specialist
FCA Canada
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post #4 of 9 Old 07-07-2015, 12:43 PM
megatone
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First, I would check the oil level, making sure the engine has the proper amount of oil. Add oil if needed.

If light is still on....

I would remove the electrical socket from the oil pressure sensor and see if there is any oil on the electrical terminals within the socket. If oil is present on the terminals, I would replace the sensor.

If light is still on....

I would look under the oil filler cap and if I see ANY type of hard oil deposits, I would run half a quart of diesel fuel in the oil and for 30 minutes to clean out the internal engine oil passages....do another oil and filter change.

If light is still on....

I would get an actual mechanical reading of the actual oil psi, making sure pressure is within specs. If pressure is good, I would drop the vehicle off at a shop for professional diagnosis. If pressure is low, I would remove the oil pan and clean or replace the oil pick-up tube/screen.

One of the last things to go bad on an engine is the oil pump...yeah, they fail, but when they do, it's usually a catastrophic event. With obvious major damage.
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post #5 of 9 Old 07-09-2015, 10:47 AM
AVR2
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2002 WJ 
 
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9 times out of 10 it's the sensor that's bad. It's a common failure on the KJ. Also, remember that the oil pump creates flow, not pressure. Pressure is created by the bearing clearances restricting the oil flow.

If you have actual low oil pressure, it will be due to engine wear creating looser bearing clearances. The only real solution is a bottom-end rebuild. A high-flow oil pump can be used as a Band-Aid to mask the problem, but it doesn't cure it.
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post #6 of 9 Old 12-16-2019, 10:22 AM
jp7794
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2006 KJ Liberty 
 
Join Date: Jul 2008
Location: MO
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Love this site. Experiencing the same thing with my '06. As soon as I read it was by the filter, I figured it was the sending unit. So nasty there.
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post #7 of 9 Old 12-17-2019, 06:01 AM
browning
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changed my oil sensor and all is ok ..the only way to change the sensor u have to remove oil filter for clearance ..


u will need a 27mm deep socket to remove sensor

bone collector
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post #8 of 9 Old 04-01-2020, 08:06 AM
jdom5274
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You did not state how many miles were on your Jeep, or the weight of the oil you changed. That said, I would offer the owners manual states a 5W-20 oil for the 3.7L engine and is too thin for use when mileage is over 75k. All car makers went to the ultra low weight oil for an increase in gas mileage (CAFE) on all cars. I would rather avoid an engine replacement / rebuild for a few more mpg. I would use 20W multi weight oil or any of the high mileage oils on the market. You are on the right track with your thinking about bearing clearances being a cause.
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post #9 of 9 Old 04-16-2020, 08:41 PM
Sobi1998
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Quote:
Originally Posted by browning View Post
changed my oil sensor and all is ok ..the only way to change the sensor u have to remove oil filter for clearance ..


u will need a 27mm deep socket to remove sensor

I just dealt with this exact issue yesterday. It was a pain in the ***!! The old sensor was a little small to fit the 27mm but the new one fit perfectly in the socket


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