TC reported TIMS showed obstacle detected at car 1616 'B4' door. TC recycled doors twice to clear fa ult. Fault recurred at DBG SB. Staff(RFP) checked and confir med car 1616 'B4' door opened and closed normally. ~~~~~ TC reported TIMS showed obstacle detecte     #1616-B4 door found both door wobbly.Found main roller damage-replaced both door roller.Check/service guide rail & J-rail ,no FOD.All door function and cyclic test all within criteria. Done by Asruddin/Zulq  11/04/23