Me too, I am still working on a solution, I have cleaned all wheel sensors, Checked Brake pressure transducer with multmeter Checked all DSC conectors. Apparently a dodgy battery ie low voltage can be responsible for quite a few anomalies, having checked my battery I found it was an AA temporary one, suitable for an ASTRA in normal use!!!!! waiting for new battery from "Battery Megastore" being delivered today hopefully. Also disconnecting the battery and reconnecting (Hard Reset) can fix some problems, just like computers Ha! turn it off and back on. I will let you know my progress.