Location of oil pressure sensor/switch

Hi Ron,

These are not the best illustration to show you orientation but this is under the alternator and alternator bracket. Once you get those out of the way you will see a sensor that looks like the one in the illustrations. That is your oil pressure sender.

Let me know if you need anything else. Thanks

At the mileage you listed it's more common to have worn engine bearings. Your comment about "after running for a while" the problem starts, and raising engine speed makes the light go off, supports that. Warm oil is thinner and runs through the bearings easier so it's harder to maintain pressure. Raising engine speed overcomes the pressure loss by pumping the oil faster to keep up with the accelerated internal leakage. A defective pressure sending unit isn't affected by engine speed and often not by engine temperature, so your observations suggest this isn't a sending unit problem. Regardless, if you want to try a new one first, they are almost always very close to the oil filter.

That's because oil pressure always goes down at lower engine speeds. I'm willing to bet the new sending unit won't help.