Governor Pressure Sensor Volts Too High (OBD II)

Name of Code:
168 ($A8) Governor Pressure Sensor Volts Too High

When Monitored:
Continuously with the key on and engine running.

Set Condition:
The voltage from the Governor Pressure Sensor is above 4.89 volts for 8.5 seconds.

Theory of Operation:
The governor pressure control system is used to regulate governor pressure. Governor pressure is raised or lowered by changing the duty cycle of the governor pressure solenoid. This is done by the PCM and is based on input from the Output Speed Sensor. The governor pressure solenoid is normally open, therefore 0% duty cycle provides full governor pressure and 100% duty cycle would provide 0 PSI governor pressure. The governor pressure ensor provides a voltage signal to the PCM. The PCM compares this to the target governor pressure and makes changes accordingly.

Transmission effects:
Governor pressure solenoid duty cycle is set to minimum. This results in 3rd gear launch. 4th gear (0D) and TCC operation remain unchanged. The MIL is illuminated.

Possible Causes:
- Corroded, damaged, pushed out, miswired or disconnected connector(s)
- Open Governor Pressure Sensor signal circuit
- Governor Pressure Sensor failure
- Governor Pressure Solenoid failure
- Internal controller failure (PCM)