What does the last 2 letter/number on DTC code stand for?

So my ac compressor does not turn on. I have code P0532-00-2f & now p0532-00-6c. I tested voltage to the ac pressure sensor. Voltage is good on vreff and on signal return. Also I checked the volatige/resistance on ac compressor (clutch and soliniod). Also replaced ac pressure sensor. Checked pressures high/low sides and all seems good. In my scan tool the ac pressure sensor is not reading any pressure even though system has pressure. Any ideas would be appreciated.

2018 Ford focus Titanium.