Question about 2002 Jeep Liberty
I have a 2002 Jeep Liberty and the oil pressure light comes on in the mornings when it's cold. It doesn't happen when I'm moving, only when I'm stopped for more than about 5 seconds (so not in stop & go traffic, more like at stop lights).
This just started happening about two oil changes ago. I took it to the shop the first time and they spent 2 hours trying to diagnose and/or repeat the problem and couldn't. They charged me for the diagnostics ($110) and their solution was engine oil additive.
I would like to know if:
a) anyone else has had this issue
b) what the root cause might be.
The additive is working, but my fear is that it's a band-aid and something worse will happen down the road if I don't take care of the root of the issue soon.
Chrysler mounted the oil sensing unit on these motors directly above the oil filter. It is very easy to accidently hook the sensing unit with the oil filter wrench and crack or break it. For anyone whose oil light problem developed right after an oil change, this may be the problem. To change the unit, pry up the plastic retaining clip with a screw driver and unplug the wire harness. If the plastic part of the sensor is broken, (or if you break it to facilitate easy removal), you can remove the sensor with a 27mm socket. Once you have removed it, use a piece of CLEAN pipe cleaner to insure the hole isn't plugged with sludge which could also cause the oil light to come on. Screw in the new unit finger tight, then snug up with a WRENCH. You cannot use the socket to tighten it as it would damage the plastic part of the new sensor. Plug the wire harness back on, then start the engine to make sure it doesn't leak oil around the new unit.
Posted on Jan 13, 2009
I had this same problem on my Jeep Liberty 2002. The car would beep and the check engine oil pressure light would come on when idling at low temperatures. I had the Engine Oil Pressure sensor replaced and that resolved the problem.
I would recommend 5w30 oil for cold weather driving. 10W30 is not designed for cold temperatures.
Posted on Dec 03, 2008
I also have a 2002 Jeep Liberty and from what I have been told is, it is the valve stem gaskets that need to be replaced and my jeep is burning oil. Funny though because it does not smke but I have to add oil every few hundred miles and there are no leaks. Some of the time my iol light will come on when I am driving but more when I come to a full stop and when I drive it - it goes off. I am taking it to the shop tomorrow and have the oil pump replaced and not only that last week it was my power steering pump, now my radiator needs to be replced and so I am doing the oil pump and see if that helps. I have to drive this baby cross country and it only has 105,000 on it. It also make a winndy noise when I start it and it is cold but when it warms up the sound goes away, not sure what that is but sounds like something next to the power steering pump maybe thge alternater, who knows. If anyone has a answer please let me know.
Posted on Mar 31, 2013
Sounds like the flow back in the heads or stoping up. by adding additive it thinned the oil out, causing it to return to the oil pump faster. may have to do engine flush? do you have high miles? try using 10-30 or 10-40 weight oil. hope this helps
Posted on Oct 28, 2008
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Posted on Jan 02, 2017
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