Symptoms

- Engine Light ON (or Service Engine Soon Warning Light) - Transmission shifting problem

Possible Causes

- Transmission oil burnt or oil pan has excessive debris - internal transmission damage - Faulty Governor Pressure Sensor - Faulty Governor Pressure Solenoid - Faulty Valve Body - Engine Control Module (ECM) 5 volt supply - 5 volt supply circuit open - 5 volt supply circuit open inside the transmission - Faulty Engine Control Module (ECM)

When Detected

The P1757 code will set if the monitored Governor Pressure is greater than 41.4 kPa (6 psi) for 5 seconds while the gear selector is in the Drive position with the road speed equal to zero - six times during a drive cycle. The transmission oil temperature must be between 23 - 88° C (73 - 190° F).

Description

The Governor Pressure Control System is used to regulate the governor pressure which controls the shifts for first, second, and third gear. The Governor Pressure Control System test verifies that the requested pressure and the actual pressure are within a predetermined tolerance.