WHEN BRAKE PEDAL IS APPLIED WITH CONSTANT PRESSURE, BRAKES WOULD ENGAGE THEN FAIL TO ENGAGE FOR SHORT SECONDS, THEN ENGAGE AGAIN, SYMPTOMS ARE INTERMITTENT. SOME TIMES IT WOULD TRIGGER A BRAKE RELATED DTC. TECHNICIAN DETERMINED IT WAS A FAILED HYDRAULIC CONTROL UNIT IN THE BRAKE SYSTEM AND WAS TOLD IT WAS COMMON AND OCCURRED ON A NUMBER OF THE SAME MODEL VEHICLES FROM 2005 TO 2012.