Your vauxhall,Cadillac,Is the Lancia or Saab ECU defective? This may be a problem with Bosch EDC16C9 ECU。
The ECU can be found in the following location:
Cadillac BLS
Fiat Concept
Lancia Musa
Vauxhall Astra
Vauxhall Signum
Vauxhall Vectra
Vauxhall Zafira