Low Refrigerant Message
WARNING: This page is about a different car, the 1995 Cadillac Seville, 1995 Cadillac Eldorado, and 1995 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
ACP also monitors inputs which would indicate low refrigerant charge. If system charge level drops to approximately 1/4 system capacity, a VERY LOW A/C REFRIGERANT - COMPRESSOR OFF message will be displayed and the ACP will store a trouble code.