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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 238 (HVAC System - Automatic) >> Diagnostic Information and Procedures >> DTC P0531, P0532, or P0533: Air Conditioning (A/C) Refrigerant Pressure Sensor >> Conditions for Setting the DTC

Conditions for Setting the DTC

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

P0531 

The A/C high side pressure sensor change over a predetermined period of time is outside of an acceptable expected amount. The expected amount of change is determined using ambient temperature, coolant temperature, vehicle speed, and fan speed.

P0532 

The engine control module detects that the A/C pressure is less than.25 V.

P0533 

The engine control module detects that the A/C pressure is greater than 4.75 V.

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