That's a new one for me. In the past the fuel pump and fuel supply system was never monitored or had computer controls. That was one of the few things they hadn't yet hung an unnecessary, unreliable computer onto.
I don't have access to "U" codes and I can't tell you how that code would be diagnosed. Typically your mechanic would use a scanner to talk back and forth with the various computers and make them do things so he can test their operation. A non-communicating code such as this suggests the problem is with the computer controller and not the pump itself. You've already figured that out because the pump must be working if the engine is running fine.
Tuesday, July 9th, 2013 AT 7:25 PM