Ecu problem
2012 Ford Mondeo 20 titanium x auto

I've got a 2012 Mondeo titanium x auto, the other day when driven i went to put it reverse and nothing happened just revving same when i put it in drive,
i called someone out and he said it was the( transmission control module) lost communication, he fixed it by wiping the fault but now I'm a bit worried it could come back agene when I'm on the motorway,
any idea's what's the best way to stop in happing agene??