Technical Immobiliser issue?

[Iank85]

2008 1.2 fiat punto
Car was working fine, the all of a sudden both keys have stopped working and can’t get the immobiliser off?
Any idea what this is? Or can anyone advise me what to do without spending a fortune.

Thanks

 

[the green vanper]

Strange that both keys stopped working at the same time. I wouldn't blame the keys.

Try checking errors with MES.