HVAC System - Manual

The A/C refrigerant pressure sensor signal indicates the high side refrigerant pressure to the Powertrain Control Module (PCM). The PCM uses this information to adjust the Idle Air Control (IAC) valve to compensate for the higher engine loads present with a high A/C refrigerant pressure and to control the cooling fans. A fault in the A/C refrigerant pressure sensor signal will cause a DTC P0530 to set.