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how can i fix this problem?

hi there i have a 54 plate 2ltr dti signum my problem is that when am driving the spanner light comes on and my speed goes down please please canny any body help me out thank you
tam, April 2012
Your car is telling you it is over due a service and the oil needs changing ASAP and as the oil is us the engine goes into limp mode to stop you seizing the engine

Alan, May 2012
ideally it should go onto a code reader for a look at what brings on your light

cdc, April 2012
get a code read to see what problem is but it sounds like some injecter cleaner in tank my help.or egr vavle cleaner will get rid of some of the carbon that makes them stick,

bob, April 2012
link Click here to see other fixes for Vauxhall Signum 2.0 DTi.