The real meaning of the C1868 Code helps the automobile engineer for solving the car engine problem. The general meaning of the engine is available online and do not use that meaning for solving the car engine. There are some causes of appearing the engine code and it is necessary to know those meanings. About the engine C1868 code, it would perhaps be valuable to sensibly inspect the wire bind near the intake manifold bracket. This is done the most merely from below the car in the zone near the oil filter. It is not very difficult to solve the car engine problem and without changing parts it is possible.