TC reported obstacle detected at front DT car 'A1' door. Staff (CCK) checked and confirmed no abnorm alities. TC informed that he stepped out to check front DT c ar 'A1' door and confirmed no abnormalities. TC opened and c ~~~~~ #3664 observed in Tims A1 door CLE happen twice. ER and fault trace download by PTU006. From ER observed TC cycled door 4 times to clear fault. No fault after leaving station. No FOD found. Mating strip B4 adjust T-60mm, M-61mm, B-61mm out of criteria. Readjust ok. Push/pull resistance within criteria. DSS and DLS check ok. Conduct door cyclic test ok and door static test ok. Done by Sanip/Faddzal/Deeshan. 19/04/21.