Cadillac Repair Questions? Ask a Mechanic for Answers ASAP
The low pressure sensor must read correctly to the PCM for it to turn on the compressor.
Code must be cleared from PCM & BCM for system to work.
Yes,replace the low pressure sensor & clear the codes.
Use the CRT climate control ON BOARD SYSTEM
Enter diagnostics by simultaneously pressing "OFF" & "WARMER" buttons.
Follow on screen displays to advance to ECM & BCM
When asked to "CLEAR CODES ?" YES
This is a low freon code.When the prompts ask you BCM -- enter yes
Go to the point where it ask you to clear codes -- enter yes
The system should clear this code.
All this can be done also with a scan tool connected to the data link connector below dash on drivers side.