You should find the real cause of the engine problem and that is why, you need to know the meaning of the engine P0556 Code. Do not use false meaning for fixing the car engine. The engine code is supporting content only and you may not face any more problem if you follow the correct meaning of the engine code. The powertrain of the engine is problematic and you should fix this engine problem. However, fixing this problem is not so difficult and costly. Once you solve the car engine problem in proper way, you do not face any more problem.