For misfire and fuel system monitors, if the fault does not occur on three consecutive drive cycles under similar conditions, the MIL is turned off.
Similar conditions means.
- Engine speed within 375 rpm compared to when the fault was detected.
2.Engine load within 10% compared to when the fault was detected. - Engine warm-up state or coolant temperature must match the temperature when the fault was detected.
I believe you want to know how long till the light turns its self off. As you can see it is a little difficult to say exactly when your car will reset its monitor readiness status,one significant event sets you back to zero.
I don’t think it looks good for you that several HUNDRED miles of driving (I conclude with on and off engine conditions)has passed and no light self reset,it seems someting is reoccuring and preventing a light self reset.