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Q:

oil pressure on 2002 Jeep Grand Cherokee

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
when I first start up my oil pressure indicator pegs out on high and only moves slighty after warn up
(1) Answer
Oil pressure sensor may be bad. You would have to put a manual oil pressure gauge on it and see what the actual pressure is. Since you say it does move a bit then im going to assume its still plugged in. I belive that sensor is located next to the oil filter on the passenger side of the engine