P0530A/C Refrigerant Pressure Sensor A Circuit
- Generic OBD-II code · Powertrain
- Matters for the ITP
- How the car detects it
- The engine module reads the high-side refrigerant pressure sensor (5 V reference, signal rising with pressure) to switch or regulate the compressor, raise the radiator fans at high pressure and pre-control the compressor load at idle. CARB therefore requires A/C components to be monitored where they alter fuel or ignition control or feed other diagnoses (from 2006–2008). P0530 is the general circuit fault; GM and the Saab 9-4X use the more precise P0532/P0533 instead. Saab's 2006 9-5 diesel (Bosch EDC16) assigns P0530 differently, to a short to ground below 0.1 V for 0.6 s, switching off the A/C relay. Warning lamp depends on the maker.
- What you may notice
- Air conditioning not cooling (compressor off)
- Radiator fan running permanently
- Check engine light (depending on the maker)
- Likely causes
- LikelyConnector or contacts corroded or loose
- LikelyPressure sensor faulty
- PossibleWire open or chafed
- Rare5 V reference shorted by another sensor
- Inspection (ITP)
- Can matter for the ITP: it concerns the emissions system.
- Repair
- Easy · Often possible to do yourself.Typical cost: €40 – €250
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.