DTC Advanced Diagnostics: P0532, P0533
DTC P0532:A/C Pressure Sensor Circuit Low Voltage
DTC P0533:A/C Pressure Sensor Circuit High Voltage

General Description

The powertrain control module (PCM) monitors the A/C pressure sensor. The A/C refrigerant pressure is read from the A/C pressure sensor through the analog digital (A/D) converter. This is a value corresponding to the physical value of the pressure. The signal is transformed into a physical value by a transformation curve. If the A/C pressure sensor output voltage is a specified value, the PCM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type
Execution
Continuous
Sequence
None
Duration
0.5 second or more
DTC Type
Two drive cycles, MIL off

Enable Conditions
Condition
Minimum
Maximum
Outside air temperature
-40.07 °F (-40.04 °C)
–
State of the engine
Running

Malfunction Threshold
DTC: P0532

The A/C pressure sensor output voltage [A/C Pressure Sensor] is less than 0.14 V for at least 0.5 second.

DTC: P0533

The A/C pressure sensor output voltage [A/C Pressure Sensor] is greater than 4.85 V for at least 0.5 second.

[ ]: HDS Parameter

Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
DTC: P0532
A/C pressure sensor PD SENSOR line short to ground
A/C pressure sensor VCC line open

DTC: P0533
Rocker arm oil pressure sensor PD SENSOR line open
Rocker arm oil pressure sensor SG line open

Common
A/C pressure sensor failure
PCM internal circuit failure

Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, a Confirmed DTC and the freeze data are stored. The MIL does not come on.

Conditions for clearing the DTC
The Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command.