Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › P0172 Intermittant Volvo 850T5 › Reply To: P0172 Intermittant Volvo 850T5 September 25, 2020 at 11:48 am #963847 Richard KirshyParticipant Well it was worth a try … Only thing I can suggest is testing fuel flow from each injector and see if one is pumping excessive fuel compared to the others.