Possible causes

– Low oil level or motor mechanical fault
– Faulty Oil Pressure sensor
– Oil Pressure Sensor harness is open or shorted
– Oil Pressure Sensor circuit poor electrical connection

When is the code detected?

The P0522 is set when the Powertrain Control Module (PCM) senses a signal voltage higher than the normal operating range of the Engine Oil Pressure (EOP) sensor

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)
– Oil pressure warning light ON

P0523 CADILLAC Description

The Powertrain Control Module (PCM) continuously monitors the Engine Oil Pressure (EOP). The EOP sensor measure cahnges in the oil pressure. The EOP sensor changes resistance base on the engine oil pressure.

CADILLAC Technical Service Bulletins for P0523 code