The engine B1303 Code is an important thing for solving the problem. Manufacturer can change the meaning of the code based on the model. Read the manual of the engine to detect the problem and solve the problem. When you spot grave damage, then you should replace the component. if it is related with the matter of grime accumulation or dirty plugs, then simply clean these machineries. If your cables are twisted or avoid arcing and damage caused by friction by using a spark plug wire loom or barrier on your car. Shortly, it preserves your cables controlled, making it cooler to entrée your spark plug wires for check and/or installation.