Code 68, Cruise System Problem Using Tech 1 (3.8L): Notes

PCM-integrated cruise control system is designed to monitor itself to ensure desired cruise position and actual cruise position are equal to each other. Code 68 sets when actual servo position sensor signal is 15 percent greater than desired servo position sensor signal for .6 second. Code 68 does not illuminate SERVICE ENGINE SOON light. If Code 68 is current, vehicle will operate in "power management" mode. During this mode, PCM will shut of fuel to 3 cylinders to avoid overrevving engine in case of throttle being held open by cruise system malfunction. Power management mode may be perceived as a severe engine miss of lack of power.

1. Most VAC solenoids leak a small amount of vacuum when closed. However, they should not leak enough to allow WOT in 15 seconds with vent closed.
2. When VAC solenoid is forced on, vacuum will be vented to atmosphere unless vent valve is stuck closed.