How do you fix error code U0151 in a 2014 Lancer?

You may not want to, do you still have factory warranty left on a 2014? If so, use the dealer, in fact, I would contact them anyways since this is such a new vehicle. This code is alerting you there is a loss of connection between two modules in the CANBUS system. The SRS module is not communication with the A/C module. Everything on the car must communicate to a central hub, so everything must communicate to everything else. Since the A/C module cannot communicate with the SRS module, there is a problem with one of those modules, or the wiring between the two. Test Test Test.