Question about 2002 Jeep Grand Cherokee

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I have a 2002 jeep grand cherokee lerado with a 4.0 my oil pressure is normal when i drive but when i stop my pressure goes low

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A low oil level will cause this. If the oil level is fine, then you need to have a mechanical gauge to verify the pressure is really low and that you don't have a bad oil pressure switch. You could try replacing the switch first if you don't want to put an oil pressure gauge in the vehicle. If the pressure is indeed low and the oil level is normal then replace the oil filter to see if that brings the pressure back up. If the pressure is still low, remove the oil pan to check the pick-up tube for debris. If it is clear of debris then you'll be needing to replace the oil pump. Another possible cause of low pressure is a damaged rod or main bearing and would require the engine to be rebuilt.

Posted on Jul 18, 2011

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1 Answer

2002 Jeep Grand Cherokee. I get low oil pressure alarm when I am in idle or stopped. I can press the gas and it will come back up.


change the oil with a higher weight oil. I use penzoil 20w50. put a half pint on STP oil treatment in when you change it. Thats the cheapest way to check if you have a problem. it it still does that change the oil pressure sensor/switch. if it still does it you have an expensive problem. the oil pump may be bad or your engine has low compression

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I would put a mechanical oil pressure gauge on it,to verify oil pressure.

Certainly stop driving it ,until you find and repair

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What kind of oil does a 2000 jeep grand cherokee lerado take


5W30 will be ok if low miles you can try synthetic but if not sure use conventional oil. If its leaking or burning oil move up to 10W30.

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1 Answer

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