The engine P0261 Code comes for the car engine problem. There are some possible causes of the car engine problem. Those causes are Dirty Fuel Injector 1, Faulty Fuel Injector 1, Plugged Fuel Injector 1, Fuel injector 1 harness is open or shorted and Fuel injector 1 circuit poor electrical connection. Do not drive the car with the engine. The engine code has a right meaning and that meaning is necessary to use. Do not drive the car with the car engine problem. If you know the real meaning of the code, do not try to fix the car engine.