When you face problem in the car engine, take the car for a test and solve the problem what you have faced. The engine P1731 Code is found for the test of the car engine and it is necessary to fix the car engine according to the right meaning of the code. The powertrain of the car engine is faulty and it needs to solve. For this problem, you do not need to add or remove component for solving the car engine problem. Do not use wrong meaning of the code what may trigger new problems in the car engine.