Does my Vauxhall corse 1.2 se ech tech petrol have a egr valve if so were ?

you don't say what year. Vauxhall put them in various locations and some are out of sight. look at www.allcorsa.co.uk there are various pictures showing locations on different engines. egr valves can be cleaned and in some cases blanked off. also check out other Vaux sites.

xs11
February 2015