The diagnosis trouble code B1210 has different meaning and it is based on the manufacturer of the cars and models. To know the meaning of the code, it is necessary to know the model and manufacturer. The code B1210 is the main thing for checking or to verify the process of the VCT solenoid. You are looking for a stabbing or stuck VCT solenoid valve produced by corruption. It refers to vehicle exact repair manual to achieve section exams for the VCT unit. Meaning of the B1210 is B means Body code, 1 means MFG, 2 means Computer and Auxiliary Outputs, 1 means IC and 0 means Transmission Engaged At High Throttle Angle.