Advanced Diagnostics

Advanced Diagnostics - DTC P0523: Rocker Arm Oil Pressure Sensor (Engine Oil Pressure (EOP) Sensor) Circuit High Voltage






General Description
The rocker arm oil pressure sensor (EOP sensor) detects the engine oil pressure in the VTEC system. When the voltage from the rocker arm oil pressure sensor (EOP sensor) is a set value for a specified time, the engine control module (ECM)/ powertrain control module (PCM) detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status






Enable Conditions






Malfunction Threshold
The rocker arm oil pressure sensor (EOP sensor) output voltage is 4.79 V or more for at least 2.0 seconds.

Diagnosis Details

Conditions for setting the DTC
When a malfunction is detected, the MIL comes on and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the ECM/PCM memory.

Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the battery.