The engine C1844 Code is full of information from different things and it gives information about the car engine problem. Do not use wrong information for solving the car engine problem. The engine C1844 Code problem has come for any of reason. There are some symptoms ABS Warning Light ON Engine Light ON. So, it becomes easy to understand the problem. However, once the car engine is ok, you need to take the car for a test drive and identify the car engine problem is available or not. If you find any problem in the car engine again, then take the car to the professional place.