Thank you for your question, my name is Steve and I am a fully qualified vehicle technician with over thirty years in the trade, hopefully I can help.
The Corsa electric steering system can suffer form a few different problems. The first check is to ensure the battery voltage is ok and the alternator is charging correctly. If the steering system is not received its full voltage it will not operate correctly.
The problem may also be within the steering column itself, one of the common components in the steering which fails is the steering angle sensor. To fully detect the problem the fault codes should be read using diagnostic equipment, the code which will be retrieved may be
C0545: steering torque sensor circuit, C0545: steering torque sensor plausibility, C0460: steering position sensor plausibility.
Unfortunately this sensor is built into the steering column unit and so the unit will need to be removed to send for repair.
It may be worth disconnecting the battery for a short while (2-3 minutes) as this may reset the steering, but if the voltage is good the problem is with the steering column and this will need a repair. This company will be able to give a price for the repair.
I suspect this was not what you wanted to hear but I hope this answers your question, do though feel free to ask any further details by replying to this thread.
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