engine light

first two oxgen censer i fix then transmission was fix. i had everything fix now number 3 injecter is stayin open but the car is runing smooth. the repair shop thinks its has might have something to do with the computer. setting off the light. could that be true. thanks. from frank

Hi Frank, what I'm a bit confused about is how the injector is stuck open and the engine is running smooth? How long after the other repairs did the check engine light come on?

after i got everytihng fix it came on right away