have you run the "fast tas" setup (needs factory software)? did it complete properly?
a "27" is missing some information, there should be a letter in front
E27 looks to me like it should be related to the POS (Crankshaft position sensor) but there is hardly ever a problem with them on this unit, unless the wire connection gets yanked on. have you disconnected and reconnected the vcm and ecm to move the contacts? I guess you could be checking pin to pin from the ecm to the pos and phase sensor.