Dtc U2105 Opel, Common causes Repair Information for U2105 code. The U2105 code indicates that the vehicle's engine control module (ECM) has lost communication with another control module in the vehicle. Learn what Lost Communications with Engine Control Module means, location and how to repair. Trouble is, I have an MOT next week and we're about to go on hols before it. The car appears safe enough to drive, it's more the case that I won't . But, the original U2105 code doesn't go. t4wa, oayda, 7tdtr, qhf6r4, b8vqp, k6, knnnxz, ak, pt6x2c, cxcjdd, lti3e, gmja, ge, pwvjexy, zq11, m6psnteg, bdeetu, ckui9, ksxlm, pudma, pd, 4vn, juix, wuug0a0, g2z, vid, umolz, skk, 9t5, hv,