DTC P0530: A/C Refrigerant Pressure Sensor Circuit: Description

A/C refrigerant pressure sensor is located on high side of A/C system and is used to monitor refrigerant pressure. Powertrain Control Module (PCM) uses this information to run cooling fans when A/C refrigerant pressure is high. A 5-volt reference voltage is supplied to sensor and is returned to PCM on signal circuit. Sensor resistance changes as refrigerant pressure increases or decreases. PCM monitors A/C refrigerant pressure sensor signal circuit and can determine when A/C pressure is too high or too low.