Chrysler
Type:
    Powertrain - Vehicle Speed, Idle Control, and Auxiliary Inputs - ISO/SAE Controlled
Description:
    Oil Pressure Sensor Low Input Conditions
Cause:
    Engine running (voltage more than 10v), then the PCM detected that the oil pressure sensor signal was too low

Generic
Type:
    Powertrain - Vehicle Speed, Idle Control, and Auxiliary Inputs - ISO/SAE Controlled
Description:
    Engine Oil Pressure Sensor/Switch Low

GM
Type:
    Powertrain - Vehicle Speed, Idle Control, and Auxiliary Inputs - ISO/SAE Controlled
Description:
    Engine Oil Pressure Sensor Circuit Low Input Conditions
Cause:
    Engine running, then the PCM detected that the Engine Oil Pressure (EOP) signal was less than 0.48v for 1 second.