2-3 Shift Solenoid Valve

The 2-3 Shift Solenoid valve is attached to the valve body and is a normally open exhaust valve. The VCM/PCM activates the valve by grounding the valve through an internal quad driver. The 2-3 Shift Solenoid is ON in third and Fourth gear and OFF in First and Second gear. When ON, the valve redirects fluid to act on the shift valve. The 2-3 Shift Solenoid valve is usually green.

Three diagnostic codes are associated with the 2-3 Shift Solenoid valve. The first code is Code P0758 (2-3 Shift Solenoid Valve - electrical). The VCM/PCM continually monitors the 2-3 Shift Solenoid circuit for expected voltage. If the voltage reading is not what is expected, Code P0758 will set. While Code P0758 is present, TCC operation will be inhibited, line pressure will be set to maximum, and the transmission will default to Second gear only. Recovery can occur at the next ignition cycle.

The second code is Code P0756 (2-3 Shift Solenoid Valve - performance). Code P0756 will set when the calculated gear ratio is numerically higher than the gear commanded, which must be either Third or Fourth gear. The VCM/PCM default action is Second gear only.

The final code is Code P0751 (1-2 Shift Solenoid Valve - performance). Code P0751 is set when the VCM/PCM detects First or Second gear at high speed. The VCM/PCM default action is Second gear only.