Conditions for Setting the DTC
WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
C0450 0B
The actuator current exceeds 4.5 amps.
C0450 11
The actuator current is detected as greater than 50 percent of its expected current while the actuator is commanded OFF.
C0450 17
The current through the actuator is not within 0.5 amp of its commanded value.