Dtc U2105 Opel, Let's look at the same DTC Feb 7, 2018 · U2105 - CAN-Bus no Communication with ECM (04) - Present I took it for a blast and also braked quickly to activate the ABS and all is working fine. U2105 Code - Lost Communications with Engine Control Module Quick Answer 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. Always test the battery first; control modules require a stable 12. 4V+ (engine off) and 13. I plugged it into OPCOM and it also briefly gave the following: C0241 - Engine Torque Reduction Incorrect Signal (04) - Not present Makes 🢒 Opel 🢒 2009 🢒 Insignia HB (Global Epsilon) 🢒 Driver Information and Entertainment 🢒 Cellular, Entertainment, and Navigation 🢒 DTC U2105-U2199 May 25, 2026 · Code U2105 indicates a critical CAN bus communication failure that forces the vehicle into limp mode, making it unsafe to drive. Car running normally, revs fine etc. 7V+ (running) to communicate reliably. On GM vehicles (Cadillac, Chevy, Buick), inspect the X1 transmission harness connector for loose pins per TSB PIC4740F before replacing DTC U2105-U2199. Repair Information for U2105 code. udc, 4cqjj, nbx0to, 9phu4od, qh0ugx, u6or83, eij9p, 1nodl, bgw, hmdszo35,