Reduced Engine Power Mode
WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
When the PCM detects a condition with the TAC system, the PCM may enter a reduced engine power mode. Reduced engine power may cause one or more of the following conditions:
- Acceleration limiting-The PCM will continue to use the accelerator pedal for throttle control, however the vehicle acceleration is limited.
- Limited throttle mode-The PCM will continue to use the accelerator pedal for throttle control however the maximum throttle opening is limited.
- Throttle default mode-The PCM will turn off the throttle actuator motor and the throttle will return to the spring loaded default position.
- Forced idle mode-The PCM will perform the following actions:
- Limit engine speed to idle by positioning the throttle or by controlling the fuel and spark if the throttle is turned off.
- Ignore the accelerator pedal input.
- Engine shutdown mode-The PCM will disable fuel and de-energize the throttle actuator.