Reduced Engine Power Mode
WARNING: This page is about a different car, the 2005 GMC Canyon and 2005 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
When the PCM detects a problem with the throttle actuator control (TAC) system the PCM enters one of the following Reduced Engine Power Modes:
- Acceleration Limiting - The control module will continue to use the accelerator pedal for throttle control, however the vehicle acceleration is limited.
- Limited Throttle Mode - The control module will continue to use the accelerator pedal for throttle control, however the maximum throttle opening is limited.
- Throttle Default Mode - The control module will turn OFF the throttle actuator.
- Forced Idle Mode - The control module will perform the following actions:
- Limit engine speed to idle by positioning throttle position, or by controlling fuel and spark if throttle is turned OFF.
- Ignore accelerator pedal input.
- Engine Shutdown Mode - The control module will disable fuel and de-energize the throttle actuator.