The B2105 Code is important thing for solving the problem from the car engine. The dictionary meaning of the code is general. The code B2105 is the chief thing to checked is to confirm the process of the VCT solenoid. You are observing for a penetrating or stuck VCt solenoid regulator produced by corruption. Mention to car precise reparation manual to achieve factor tests for the VCT unit. Those of the most other producers, begin the totaling of cylinders at the front and continue in arithmetic order to the back. Drive the car when the car engine problem is solved.