Vectra transport mode after battery replacement

Interesting. I had a similar problem with my Vauxhall Vectra some time ago. Did this start after, say, a battery change or a system reflash? The symptoms sound familiar; it could be the immobilizer.

Thanks. I did just replace the battery. Could that have triggered 'transport mode'? If so, do I need a workshop to fix it?

Replacing the battery is likely it. The car's computer might have defaulted, hence 'transport mode'. There might be DIY fixes, but I'd recommend a workshop to properly configure the car. They'll need diagnostics to reset the system.

Thanks. I went to a workshop, and it needed a reset after the battery change. The repair was 0€, and it's now fixed.