The B2535 Code helps an automobile engineer for solving any car engine problem from the car. Do not use any meaning of the car engine code. That meaning may make more new trouble for your car engine. You need to use actual meaning of the car engine code. So, for the meaning of the engine B2535 code, you have to get the meaning what is set by the manufacturer. The general meaning of the code is available online and do not use that meaning for solving the car engine problem. However, if you want to get general idea, then you can follow the general meaning of the code.