The engine P0135 Code is very necessary thing for solving the car engine problem. It is found in every car and if the car engine problematic, then engine code reader car identify the code according to the engine area. Do not drive the car with any problem of the car engine. You should depend on the car manufacturer. The car engine problem can be connected with the powertrain problem and this engine code has started with the powertrain problem and that is why, the engine code is started with P. Do not drive the car until the car engine is fixed.