WARNING: This page is about a different car, the 2005 Mitsubishi Endeavor. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: CAN Communication-Related DTC Code (U Code) TABLE (1 Of 2)
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Fig 2: CAN Communication-Related DTC Code (U Code) TABLE (2 Of 2)