Oil pressure gauge problems

[Rawze]

(08-23-2022 )Hemiterry Wrote:  ... The big problem is it sits at about 5 psi at idle when hot which sets off the stop engine and engine warning lights.
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is this on the mechanical gauge and the sensor reading?.. or just the sensor, but not the mechanical gauge?.

Also, maybe check the +5 volt supply line to the oil pressure sensor. That supply voltage is connected to more than one sensor. Looking up the ECM wiring diagram on Quickserv.com is the place to see what all it connects to.

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If the pressure is actually falling off too much, change the oil filter and see if the pressure comes back up to normal levels for a while again. If it does, then you have an excess soot-packing issue that is getting into the oil and clogging up the filter. That would be very bad.