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The oil pressure gauge on my 02 TJ 4.0 is pegged at 80 and its running fine. It just started this. I'm assuming its a bad sensor or something. does anyone have any ideas?
 

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Turn the key to the "on" position and watch the gauge. If it reads more than zero with the engine off, you have a bad sending unit.
 

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Most likely its the oil sending switch, but one from the dealer. They are more reliable than those from auto parts stores. (Made in China)
 

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Takes five minutes and one wrench to swap out the sending unit. $26 at autozone. Did mine a few hours ago. Mine was failing low though, not high. Try to put some newspaper under you because a little bit of oil will drip out
 
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