DTC 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 valve pause 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 | 2 seconds or more |
| DTC Type | Two drive cycles, MIL off |
Enable Conditions
DTC: P0522
| Condition | Minimum | Maximum |
|---|---|---|
| Barometric pressure [Baro Sensor] | 70 kPa (20.5 inHg, 520 mmHg) | - |
DTC: P0523
| Condition | Minimum | Maximum |
|---|---|---|
| Engine coolant temperature [ECT Sensor 1] | 104 deg.F (40 deg.C) | - |
| Engine speed [Engine Speed] | - | 6, 000 RPM |
[ ]: HDS Parameter
Malfunction Threshold
DTC: P0522
The rocker arm oil pressure sensor output voltage [Rocker Arm Oil Pressure Sensor Voltage] is 0.18 V or less for at least 2 seconds.
DTC: P0523
The rocker arm oil pressure sensor output voltage [Rocker Arm Oil Pressure Sensor Voltage] is 4.79 V or more for at least 2 seconds.
Possible Cause
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 or by disconnecting the 12 volt battery.