Need more information to give an answer, Including the year, type ie Vectra B, Ecotech, Petrol Diesel?
1: Is the MIL on before or after the fault happens?
2: Is the engine at normal temperature?
3: Has the fault just happened?
This vehicle may be flash readable, I have the info for doing it, should you want it.
ACS Diagnostics acs@freeuk.com
Richard, January 2009
