Code result
P0533
A/C Refrigerant Pressure Sensor Circuit High Input
Moderate severity
What it means
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?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Condenser blocked or fan inoperative
mediumA plausible cause — test and verify before replacing parts.
Sensor circuit shorted to supply
mediumA plausible cause — test and verify before replacing parts.
Connector pins corroded - high contact resistance
lowLess common, but worth ruling out after the more likely causes.
Related help
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