Thursday, February 16, 2023

P0523 Engine Oil Pressure Sensor/Switch Circuit High Voltage


Diagnostic trouble code P0523 indicates that there is a problem with the engine oil pressure sensor/switch circuit, specifically that the circuit is reporting a high voltage. The engine oil pressure sensor/switch is responsible for monitoring the engine oil pressure and sending a signal to the engine control module (ECM) when the pressure is outside of the expected range.

When the ECM detects that the circuit is reporting a high voltage, it will trigger a Check Engine Light (CEL) to alert the driver of the problem. This can indicate a range of issues, including a faulty sensor/switch, a wiring issue, or a problem with the ECM itself.

To diagnose the issue, a mechanic will typically start by inspecting the wiring and connections to ensure that there are no obvious signs of damage or corrosion. They may also test the sensor/switch itself to see if it is functioning properly. If the issue is not immediately apparent, further diagnostic testing may be necessary to determine the root cause of the problem.

If left unresolved, a high voltage in the engine oil pressure sensor/switch circuit could potentially cause damage to the engine due to a lack of proper oil pressure. It is therefore important to have the issue diagnosed and repaired as soon as possible

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