A/C Refrigerant Pressure Sensor

A scan tool displays A/C refrigerant pressure in psi. The sensors range and corresponding display should be in the range of 0 to 450 psi. A sensor or circuit problem should set DTC P0530. A poor ground at the sensor will result in a fixed high pressure value on the scan tool display. Refer to A/C Compressor Control Circuit Diagnosis. Component Tests and General Diagnostics