The automobile engine should be fixed according to the correct meaning of the car engine code. The engine P1871 Code has various meanings and you must look for the real meaning of the code what is found from the car manufacturer according to the brand of the car. Do not use meaning of the engine code from different car manufacturer. You may face terrible problem if you use wrong meaning of the code. The powertrain problem can be fixed easily and do not drive the car if the problem is not fixed. When the car engine is fixed, you must test the car engine.