it means you have an error logged in the ecu, either you hit fuel cut at some point or something else is causing it to come up,
have you done an error check?
report back once you have done the test and we can determine the fix.
just a warning tho, I wouldnt boot the car too much if you are getting the error light show up, as it might be detrimental to the car,also a logged error will cause the car to drink more fuel and feel sluggish.. once you have cured the error and reset the ecu all should be well.