audifan
A2OC Donor
The A2 electrics are a nightmare. The car is designed to shut down circuits when the battery is low. This can happen due to the battery being old, not charging correctly, something draining constantly, or the vehicle not being used for an extended period. The battery also never recovers to its fully charged state after going flat. The circuits it shuts down include central locking, power steering and ABS!!!!!! There are others that also shut down. I am pretty sure the electric power steering is not speed sensitive so it runs all the time when you move the steering wheel and this does take a fair bit of power and perhaps can trigger faults in other systems due to lack of amps. Not saying it will definately cure the MIL light but a 9 year old battery you are really tempting warning lights to turn the dash into a disco. First thing I would do is to change the battery for the correct size and ampage for your car and after that scan and clear all faults. Drive the car and see if or what lights or error codes get triggered.