Diagnostic Aids

Check all connections at transmission. An open in ignition feed circuit can cause multiple DTCs to set.

Fig 1: DTC 81 Schematic ("G" Series - 4L60-E) 2-3 Shift Solenoid Circuit Fault

Fig 2: DTC 81 Schematic ("G" & "P" Series - 4L80-E) 2-3 Shift Solenoid Circuit Fault

Fig 3: DTC 81 Flow Chart (All Models) 2-3 Shift Solenoid Circuit Fault