Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › High AC low pressure › Reply To: High AC low pressure January 27, 2021 at 9:02 am #988396 Bennett FleisherParticipant Ok, I now understand that with the engine off, I am reading static pressure. So, by it not changing when the vehicle is running and clutch engages, am I looking at a broken shaft on the compressor or something else?