DTC Descriptors
WARNING: This page is about a different car, the 2007 Suzuki XL7. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0638 Throttle Actuator Control (TAC) Command Performance
DTC P2100 Throttle Actuator Control (TAC) Motor Control Circuit
DTC P2101 Control Module Throttle Actuator Position Performance
DTC P2119 Throttle Closed Position Performance