What does code 173 mean on the 2016 chevy trax?

Code 173 on a 2016 Chevy Trax means that there is a fault with the differential control module. The differential control module makes corrections by deterMINIng where the driver wants to go and where the vehicle is going to make a correction.They can go bad overtime, due to normal wear and tear or if You regularly take the vehicle off-roading. If they wear out and You don't address the issue, the wheels can lock up. You may need a new rear differential if You hear noises, there's looseness, or Your car has been damaged in an accident.