P0523

DTC P0523 Engine Oil Pressure (EOP) Sensor Circuit High Voltage

Circuit Description

The engine oil pressure (EOP) sensor is installed to the engine cylinder block and it detects the engine oil pressure in the oil gallery converts the pressure into a voltage signal and sends the signal to the ECM. The sensor has the following circuits:

^ 5 volts reference circuit
^ Low reference circuit
^ EOP sensor signal circuit

The EOP sensor provides a signal to the ECM on the signal circuit which is relative to the engine oil pressure changes in the oil gallery. The ECM should detect a low signal voltage at a low engine oil pressure. The ECM should detect a high signal voltage at a high engine oil pressure. The ECM sends the engine oil pressure information to the instrument panel (IP) cluster via the controller area network (CAN) serial data circuit. If the ECM detects an excessively high signal voltage this DTC will set.

Condition for Running the DTC

^ DTCs P0117 and P0118 are not set.
^ The battery voltage is between 10 to 16 volts.
^ The ignition switch is ON.
^ The engine is running.
^ The engine coolant temperature is more than 176°F (80°C)

Condition for Setting the DTC

^ The ECM detects that the EOP sensor signal voltage is more than 4.8 volts.

Action Taken When the DTC Sets

^ The ECM illuminates the SVS lamp when the diagnostic runs and fails. Refer to DTC Type Definitions for Action Taken When the DTC Sets - Type C.

Condition for Clearing the DTC

^ Refer to DTC Type Definitions for Condition for Clearing the SVS Lamp DTC - Type C.

Diagnostic Aids

^ If an intermittent condition is suspected refer to Intermittent Conditions in this section.

Circuit/System Testing DTC P0523