Advanced Diagnostics

DTC P0523 (22) Advanced Diagnostics

DTC P0523:

Rocker Arm Oil Pressure Sensor Circuit High Voltage





General Description

The rocker arm oil pressure sensor detects the engine oil pressure of the variable cylinder management (VCM) system. When the voltage from the rocker arm oil pressure sensor is a set value for a specified time, the 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 output voltage is 4.79 V or more for at least 2.0 seconds.

Driving Pattern

Start the engine. Hold the engine speed at 3,000 rpm without load (in P or N) until the radiator fan comes on.

Diagnosis Details

Conditions for setting the DTC

When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on and a Confirmed DTC and the freeze data are stored.

Conditions for clearing the MIL

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.