Air bags in car doors. Now i've heard it all. They will be putting them in the sun visor next. What were YOU doing removing a TRAINED MECHANIC ONLY piece of vehicle safety gear and seriously dangerously at that!

Get the code cleared and hope the light goes out!

the air bag module covers the inner door handle location, once door card is removed ,the air-bag needs to be unpluged and unscrew"d from the door ,to uncover the cut-out ,to reach the door handle mechanism.

The system detected that there was no airbag (for a while) and is reporting that fault.

Chances are that it will clear after a number (possibly as many as 20) of engine starts with no other faults detected.

Or you can get the fault cleared, either buy a fault reader or go to a garage.

door handle and backing mechanism ,air bag unit has to removed to get at unit,

Why did you remove an air bag to replace door handle? Your question makes no sense.....