OBD-II code · Powertrain (generic)
P0533 A/C Refrigerant Pressure Sensor "A" Circuit High
A/C pressure sensor signal voltage above the upper threshold — short to supply, defective sensor, or a system overcharge/blocked condenser causing genuine high pressure.
Is it safe to drive with P0533?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- PossibleCondenser blocked or fan inoperative
- PossibleSensor circuit shorted to supply
- Less likelyConnector pins corroded - high contact resistance
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.3–2.5 h
- Emissions test
- Usually unaffected
- Parts involved
- AC Pressure Sensor, AC Condenser
Related codes
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.