The engine P261C Code is an explanation of the car engine problem. There are several causes of the car engine problem. Those causes are Faulty Coolant Pump Relay, Faulty Coolant Pump, Coolant Pump harness is open or shorted and Coolant Pump poor electrical connection. You should analysis all symptoms to find out the car engine problem. When you need to fix the car engine, you should know the meaning of the car engine code. Do not allow wrong meaning of the code for solving the car engine problem. Once the car engine is fixed, a test drive is recommended.