Yes it was the sensor. It was broken at the epoxy seal where the black plastic meets the aluminum bottom. The two halves were spinning freely. I'm surprised I even had an intermittent signal. I must have broken it when I used a plain socket that caught it wrong and broke it. A good reason to buy the Lisle sensor socket.I obviously missed what the cause was. Was it the O ring or the oil pressure sensor? I was having the same exact issue and symptoms in my Express van but was never able to figure it out.
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