Answers: first of all, within the US, as long as you are under 3yrs and 36k miles you are covered lower than a federal emissions ruling and the dealership CANNOT legally charge for a diagnostic. your check engine desk light is an indicator that reads your OBD (On Board Diagnostic). Most states (like Texas) use this for emission testing....topping past its sell-by date the tank wont trip the wishy-washy. i will bet you the code from the diagnostic is an "Evap system leak" which means.... you didn't tighten the gas panama enough. cause sure it clicks 3 times. then budge get the PCM flashed (for free). i bet it wont come subsidise on. 90% of the time on newer cars that come into my shop, this is the problem.
no, it is nothing to "worry" give or take a few except gas vapors are escaping from your fuel tank... i.e. your waisting gas and at $3 a gallon.....
I don't suggest topping off the cistern is going to cause the engine hurricane lantern to go on. Is the fuel cap/door expand?
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