P0532
A/C Refrigerant Pressure Sensor "A" Circuit Low
A/C pressure sensor signal voltage below the lower threshold — open, short to ground, sensor fault, or a refrigerant charge so low that the pressure is genuinely low.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Refrigerant charge lowCommon
- Sensor circuit shorted to ground or openPossible
- Connector pins corroded - high contact resistanceLess likely
Parts involved
- AC Pressure Sensor
- AC Refrigerant
P0532 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.