2 4 stops in reverse gear

my car 2005 model 307 hdi I bought the car new, there was no problem in expertise, but the car stopped in 2 4 reverse gear it gave antipollution fault error, I took it to a place where it gave the fuse box malfunction I asked somewhere injector said I made both of them but still the car is giving me the same problem. does it show

First of all, welcome to us. Look at the fault codes with the original software. my skin may also have a problem with the electrical installation or somewhere else may be doing chassis. If there was a problem with the injector, it would be a problem in all gears.

is his brain broken

Could I have a teacher check the engine ecu (brain)