DTC 94-4 - Fuel Air Pressure OORL DTC 100-4 - Engine Oil Pressure OORL DTC 102-4 - Intake Air Pressure Voltage OORL DTC 108-4 - Fuel Air Pressure OORL DTC 135-4 - Fuel Air Pressure (FAP) OORL (GM LPG Only) DTC 135-18 - Fuel Air Pressure minus (MAP) OORL (GM LPG Only) DTC 157-4 - Rail Pressure Sensor Voltage OORL DTC 3251-4 - EGP Sensor OORL DTC 523859-4 - Service Brake Pressure OORL DTC 523958-4 - Hydraulic Aux 1 Pressure OORL DTC 523959-4 - Hydraulic Aux 2 Pressure OORL DTC 524223-4 - Transmission Reverse Pressure OORL DTC 524224-4 - Transmission Forward 2 Pressure OORL DTC 524225-4 - Transmission Forward 1 Pressure OORL DTC 524282-4 - Hydraulic Lift (Load Weigh) Pressure OORL
POSSIBLE CAUSE
A. SENSOR SUPPLY OPEN CIRCUIT B. SENSOR SIGNAL OPEN CIRCUIT C. SENSOR SIGNAL SHORTED TO SENSOR GROUND D. SENSOR SIGNAL SHORTED TO FRAME GROUND E. SENSOR FAILURE F. FUNCTIONAL FAILURE IN CONTROLLER

100-4 is engine oil pressure low. This should not effect the transmission function. Is this the only code that comes up?

Fluid level okay. The unit has one code 100-4
Thank you for the replay.

Have you checked the fluid level in the transmission? Are you seeing any codes on the dash display when this happens?