You need to know the cause of the car engine problem and get the cause of the engine’s P0624 Code. By the right meaning of the code, you can fix the car engine. Test the car’s engine and solve the car engine according to right manner. You should check these Fuel Composition Sensor Circuit Malfunction, Cylinder 1 Injector Circuit Low and Crankshaft Position Sensor B Circuit Malfunction by steps. Perhaps the main effect of injector disappointment is due to the injectors having dangerous return movement or back leakage. This is due to damaged shares which allow extreme fuel to go finished the diesel injector and to reappearance back to the tank or fuel system.