Generic
Type:
    Powertrain - Vehicle Speed, Idle Control, and Auxiliary Inputs - ISO/SAE Controlled
Description:
    A/C Refrigerant Pressure Sensor "A" Circuit Range/Performance

GM
Type:
    Powertrain - Vehicle Speed, Idle Control, and Auxiliary Inputs - ISO/SAE Controlled
Description:
    A/C Refrigerant Pressure Sensor Performance Conditions
Cause:
    Engine running, then the PCM detected that the A/C Refrigerant pressure did not change by more than 4 psi with the A/C clutch cycled from off to on, condition met for less than 10 seconds.