If you are referring to the Check Engine Light, then the computer has detected a problem with the emissions system.
The emissions system will detect problems between the two oxygen sensors fitted before and after the catylistic converter, on the exhaust. This is a engine type icon.
The icon that shows a car body, with a spanner on it (this is not the service indicator! that is displayed on the LED screen where the milage is displayed, shortly after turning the ignition on), means that there is a problem with the vehicles electrical system. In most cases with Corsa's, the alternator overcharges.
In both cases i recommend either main dealer, or professional help, as both indications can be rectified using diagnosis equipment suitable for that vehicle.
The shift light on a Vauxhall Corsa is a light that indicates whether or not you're driving in low gear. It is typically located right on the dash.
take bulb out lol
Red
A spanner
air flow meter
Under The Steering Wheel
Turn light switch clockwise
check your door contact
May depend on model, especially if an early model. My Corsa has two.
1 reverse light and 1 tail light
easier to buy a complete new light mate
You can turn on and off the inside light by pulling in/out the switch for the front lights.