Hello and thanks for your question in the autoaid Community.
This fault Code means: N49 (STEERING ANGLE SENSOR) ZERO POINT VARIATION
If you had deconnect your battery at the car, the steering angle sensor hast to learn in. But i think that these Item has to be renewed. But you can learn in and check the sensor, make the following:
Deconnect and connect the battery, then you turn the steering, by Running Engine from the middle Point to complete left, Hold there a Moment (1-2 seconds), Thema complete to the right and hold there. After this back to the middle and hold there. After this procedure your steering angle sensor had learn in. When the Code is also there, you habe to renew this. But for this the steering wheel with the Airbag Must be away..If you have no idea for this, give it to a Workshop, because this is very dangerous.