Already did the lock/unlock thing weeks ago but nothing still, I just believe if a right programmer can be used it should be fine, the ish is I don't know which programmer will work so I ask for around for a mechanic that might have or if there's another solution please I'm all ears

I took my car to my mechanic to get the radio checked but after trying to trace what the might be, the car refused to start, it doesn't even crank, it says start prevented, try again and when diagnosed it says "ECM 720A, immobilizer communication missing" this car has been there for 3 week...