2001 Fiat Punto LIMP HOME MODE

I would replace the camshaft and crankshaft sensors here are guides that will show you what you are in for when doing the job.

https://www.2carpros.com/articles/camshaft-angle-sensor-replacement

and

https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

Cheers