Hi.
I have a 55 plate fiat doblo 1.3 multijet been an excellent runner until I went on holiday came back, started first time reversed ro pump up tyres turned back on and nothing, have replaced battery and jump started but still nothing, took to mechanics who have tried starting but no joy, had RAC out today plugged in diagnostics machine but it couldnt read ecu, very confused now as looking like a big problem, thought Id give here a go before contacting fiat dealer, any advice much appreciated, cheers

Has the ignition immobiliser light (normally the orange key logo) gone out?

Could you be a bit more descriptive about 'nothing' please?