DTC Advanced Diagnostics: P0522, P0523
DTC P0522:Rocker Arm Oil Pressure Sensor Circuit Low Voltage
DTC P0523:Rocker Arm Oil Pressure Sensor Circuit High Voltage

General Description

The rocker arm oil pressure sensor detects engine oil pressure in the 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
Execution
Continuous
Sequence
None
Duration
0.5 second or more
DTC Type
Two drive cycles, MIL off

Enable Conditions
Condition
 
Vehicle
ON mode

Malfunction Threshold
DTC: P0522

The rocker arm oil pressure sensor output voltage [Rocker Arm Oil Pressure Sensor] is less than 0.24 V for at least 0.5 second.

DTC: P0523

The rocker arm oil pressure sensor output voltage [Rocker Arm Oil Pressure Sensor] is more than 4.73 V for at least 0.5 second.

[ ]: HDS Parameter

Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
DTC: P0522
Rocker arm oil pressure sensor OPSEN line short to ground
Rocker arm oil pressure sensor VCC line open

DTC: P0523
Rocker arm oil pressure sensor OPSEN line open
Rocker arm oil pressure sensor SG line open

Common
Rocker arm oil pressure sensor failure
PCM internal circuit failure

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, a Confirmed DTC and the freeze data are stored. The MIL does not come on.

Conditions for clearing the DTC
The Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command.