Conditions for Setting the DTC
WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
This DTC will be set as current when the duty cycle of the PWM input signal is less than 2 percent or more than 98 percent for more than 90 seconds.