DT551 / 552 Undershoot dershoot. /08/2021, 0929hrs, 1907hrs, 2016hrs, 2107hrs, 2137hrs normal BCP @ DT car observed in RS logs. s help to rectify. ~~~~~ DT551 / 552 Undershoot     ER downloaded PTU006.Check no fault code brake related fault.Check all car Dump v/v test ok.Check BCP within criteria.#3552 BCP slightly higher compare other car DT(3551)Replace control pressure transmitter BCP improve.PBSV found air leak-tightened ok.Check ASP-2.80bar within criteria.Car ht #3552-A1=848,B1=853,A2=855 ,B2=853.Check leveling v/v ok.Check ACU no abnormalities. Done by Saini/Asruddin. 27/08/21