I do apologize for the non much descriptive title, I'll try to work out a better title.
Yesterday my car all of a sudden stopped starting (namely I turned the key, the engine cranks that my car doesn't start). I'm not an expert but my only initial guesses were either the battery (but it's new, because I've changed recently... so no) or the spark plugs (which I've checked, they seem fine as well).
I took it to the mechanic and apparently they can't figure (at the moment) what the issue is, they mentioned that there's no power going to the engine and it has something to do with the immobilizer (but they're not sure of that either).
Apparently it's going to cost a lot of money to fix it, because and the investigation itself is going to be quite involved.
It's a second hand car, I bought it 4 years ago (a Peugeot 206). Mostly asking now if someone has some insight to share that I can use to have a discussion with my mechanic about whether or not is worth even attempting to fix it.
I might be able to give you more info if you ask.
Update There's a minor thing I've actually done now that I think about it...which is changing the case of my key fob.
Is it possible there's any relationship between this and my car not starting?
I've also found this forum where the issue seems very similar to mine.