Code P1568, Cruise System Problem (SPS Indicated High): Notes

Control module controlled cruise control system is designed to be self monitored to ensure desired cruise servo position and actual cruise servo position are equal to one another. When Code P1568 is set, vehicle may operate in power management mode and Code P1599 will set. While in power management, control module will shut off fuel to 3 cylinders to avoid overrevving engine in case throttle is being held open by a sticking cruise control throttle cable, brake vacuum release valve, or cruise control servo. Power management may be perceived as a severe engine miss or lack of power.

When Code P1568 is set, control module will not allow cruise control operation. Condition that causes Code P1568 may cause vehicle to operate in power management and Code P1599 to set. P1568 does not illuminate Malfunction Indicator Light (MIL).