Control indicator lights up for a few seconds when ignition is switched on.
If it lights up when the engine is running:
Fault in engine electronics system or transmission electronics system. Electronics switch to limp-home programme, fuel consumption may increase and driveability of the vehicle may be impaired – see page 190. We recommend that you consult a Vauxhall Authorised Repairer.
If it flashes when the ignition is on:
Fault in the electronic immobiliser system; the engine cannot be started –
see page 59.
An online manual can be downloaded from Vauxhall's website if you don't have one.