The 2016 Cadillac CTS with the 2.0L Turbo LTG and 3.6L V6 LGX engines introduced automatic engine stop-start, a feature that automatically shuts down the engine when the vehicle is stopped (such as at a stop light) and restarts it when the driver begins to lifts his or her foot off the brake pedal. The goal is to improve fuel economy and conserve fuel, which sounds great in theory and works well, in our opinion, too. But some owners find the feature to be unnerving and annoying. So if that’s you, then this how-to is for you.
Disabling the engine auto stop-start is very simple: locate and press (touch) the auto engine stop-start button located to the left of the CUE infotainment system. The button features an “A” encapsulated in a semi-circle.
Upon pressing the button, the vehicle will display a notification in the driver information center (DIC) stating that engine auto stop has been disabled. In addition, the indicator light on the switch will illuminate when the system is operational; by contrast, the indicator will not illuminate when the auto stop-start system is not operational.
Unfortunately, the system defaults back to “on” at each ignition cycle. meaning that if you turn auto stop-start off, shut off the vehicle, and then restart it, then auto stop-start will re-eanble itself. You’ll have to press the button again to disable it.