astra 2.0 cdx after driving for a while some times the abs light comes on . switch off engine after usual check goes out may come back on 15-20 mins time not all ways. All-so some times have idle problems ie as you slow down the engine stays a high rev's or rev's up down on its own. HELP
You don't say what year your car is but as it has ABS Iwould presume it is fairly new, if that is the case the only way to diagnose the sort of problem you have is to get it diagnosed at a Vauxhall dealer on their electronic equipment.