Your car engine may not work swiftly for several reason and one common reason is a dead battery. Many people do not notice the problem in the car engine and they do not check the battery condition often. There are several ways the engine problem may start. However, when you check the car engine, an engine code will come up what contains meaning. The engine P1846 Code is found from the car engine and code lets you know about the problem of the car engine. Do not fix the problem of the car engine by yourself if you have not much idea about the car engine.