The car is displaying check emissions

No references to this vehicle-Scan the computer for code/s this might give you a starting point is to why the emission light came on-

No plz

Have the computer scanned for code/s if any present comeback with it-I'll be waiting for your return-

Ok many thanks

You're welcome

Hello
Pls as you said l took it to the garage for dignossis test and they said is something call catalytic but nothing. They just unplug on cable and fixed it back and it clear.
Since then the check emission did not appear again. But today l bought petrol from shell and after 1mile the check emission came up again on the dashboard. Plz kindly advice
Thanks

Have it scanned again and see if its the same code that's popping the light