You may face terrible problem from the problematic car engine. You need to fix the car engine properly and the engine code what will get by the test of the car engine. The engine P0993 Code is found by the test of the car engine. If you want to fix the car engine, you need to know the meaning of the code what will take from the car engine manufacturer. Read the car engine manual and you will find the real meaning of the code by the name of the car manufacturer and car model name. Find the cause of the engine problem and fix the car engine properly.