Volvo All Engines (2010 Emissions) Fault Code: SPN 4813 FMI 3 PID: PSID 72 Engine Oil Thermostat Bypass Valve Opening

The oil thermostat is located in the oil filter housing and controls the engine oil temperature by controlling if the oil is sent through the oil cooler or not. The Engine Control Module (ECM) monitors that the thermostat is working as expected by comparing the Engine Oil Pressure (EOP) Sensor value to a calculated oil temperature.

Conditions for diagnostic trouble code (DTC):
1) The current at pin A14.EB:53 is above 2.2?A
2) Ignition key in ON position

Observable symptoms
1) Low oil temperature

Probable cause
1) Short circuit to voltage supply, control wire
2) Short circuit in control valve

Diagnostic operating conditions
1) Increased fuel consumption

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