Lambda sensors

[The_one]

Ok one is coloured blue one is coloured green (the plugs), as i took off my 4 2 1 manifold the wkend so dont know which colour goes to manifold and which to cat?

The engine light is still lit on my dashboard, the car drives fine, pulls as normal and isnt drinking fuel, could i have put them wrong way round?

Or do i need to reset ecu by disconnecting battery or soemthing?

Thanks

[SaxoAL]

Green to first Lambda (manifold)
Blue to Cat

May take a while for ECU to reset light. take power off for an hour or 2, then go out for a bit of a drive. Switch of car , then switch back on again. Engine Management light should then go off.