I OWNED a 2007 s60 which has been parked for 6 months because I was overseas,during that time the battery was disconnected.When I came back home to the States,my key transponder was lost,only had one key.so I called a Locksmith he came over and made me a regular key,which was able to open my door and start the vehicle after I replace the battery,but the next day the car WOULD not start,NO CRANK at all,i receive message that say.What could the possible issue be?IMMOBILIZER AND IGNITION SWITCH ARE BOTH Good.

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"Start prevented, Try again"

 

Unless the key has a transponder chip in it and programmed by the dealer, it will not work properly. I don't even think of locksmiths with cars. I go to the dealer.

 

Unfortunately, it sounds like you may have to go to the dealership to get this sorted.

I'm in a situation where I can't get the car started either.
In My case, I need a Transponder Key made. Labor, Programming & Software alone is Dealer Quoted around $250(US).

I can't even find a Locksmith in my area that can do this job.