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P0523 Diagnostic Trouble Code Discussion for February 2020

Engine Oil Pressure Sensor Circuit High Voltage

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Trouble Ticket Help Requests for DTC P0523
Help Request Posted
2008 GMC Savana 3500 6.0L MIL Lamp on, Oil psi gauge inop VIN: 1GTHG35K58
P0523: Oil psi sensor/switch voltage high. I have a van with P0523 code (constant). The oil psi gauge is inoperable. Ground wire at sensor ohms out good, 5 volt reference at sensor is constant.Replaced oil psi sensor = no change. Jumper 5v reference to signal wire pegs oil psi gauge. I believe the ...
February 01, 2020