How to Turn Off the Auto Start-Stop Function in Cadillac XTS?

[DiViolet]

On the Cadillac XTS center console, next to the gear shift lever, there is a button to turn off the engine start-stop function. It features a circular arrow with an 'A' inside. If you do not wish to use the auto start-stop feature, you can press this button before driving to deactivate it. There are several situations where it is advisable to turn off the auto start-stop function: 1. Temporary parking on a slope. When temporarily parked on a slope, it is best to avoid using the start-stop system. The system starts relatively slowly, and when releasing the brake, the vehicle may slide. The engine might not start quickly enough to provide sufficient braking power, leading to potential hazards. 2. Low-speed parking. Frequent start-stop cycles can result in incomplete fuel combustion, leading to carbon buildup and increased pollutant emissions. Therefore, it is better to turn off the auto start-stop function during parking. 3. When using the air conditioning. In extremely hot weather, especially in southern regions where the air conditioning is running at full capacity, it is recommended to turn off the auto start-stop function. The air conditioning requires significant power, and if the engine is off, the vehicle's electrical system may not provide enough power to run the air conditioning, causing discomfort to passengers. 4. During heavy traffic congestion. In such situations, the engine may remain off for extended periods, causing the combustion chamber temperature to drop. This can lead to the formation of carbon deposits from unburned hydrocarbons and paraffin on the cylinder walls.

[Harrison]

Actually, when driving the Cadillac XTS, I often ponder about the auto start-stop feature. Turning it off is quite simple: after starting the car, find the button on the center console with a circle around the letter A, press it, and the dashboard will display that the start-stop is deactivated. Having to repeat this operation every time you restart the engine is indeed a hassle, especially in traffic jams where frequent start-stops disrupt the driving rhythm. Once, at a long traffic light, the start-stop suddenly activated, and the air conditioning stopped for a few seconds along with it. The sweaty experience made me develop a habit of turning it off as soon as I get in the car. Although this feature theoretically saves a bit of fuel, when it came time to replace the battery, I realized it had caused additional wear and tear on the battery life, making it more of a loss than a gain.

[OMiranda]

I still remember the first time I used the XTS, I was completely clueless about the auto start-stop feature. Every time I stopped at a red light, the engine would suddenly shut off, startling me so much that I nearly hit the wrong pedal several times. Later, I discovered a standalone button on the left side of the steering wheel's center console area marked with an 'A' symbol. Pressing it to illuminate would disable the auto start-stop. However, it automatically reactivates every time the car starts, which isn't very user-friendly. Some car enthusiasts suggested going to a professional modification shop to reprogram and permanently disable it, but I found it too much hassle and kept doing it manually. Additionally, I noticed that when the air conditioning is set to too low a temperature, the auto start-stop temporarily stops working—a little loophole left by the system, I suppose.

[SanBella]

From my experience, the first thing after getting in the car and starting the engine is to locate the round 'A' button on the center console and press it to turn off the auto start-stop. The design flaw of this function is that it cannot remember the state, requiring repetitive operation each time. For a period, I specifically tested it—turning it off resulted in only a 0.3-liter increase in fuel consumption during city commuting, but it saved the jittery feeling of frequent starts. To solve it completely, I suggest checking car owner forums; some modification shops can reprogram the ECU to permanently disable it, though tampering with the circuit might affect the warranty. Also, note that in winter, the auto start-stop reacts slower, making it less efficient than simply turning it off.

[MacFinn]

The easiest way is to press the physical button with the 'A' icon on the center console when fastening your seatbelt. Cadillac's start-stop logic isn't very smart—the frequent vibrations in traffic are annoying. I once took apart the button panel and found it directly connected to the control module. Rumor has it that newer models have switched to touchscreen operation, while older ones still use mechanical buttons. Although turning it off increases fuel consumption slightly, the repeated engine start-stop cycles cause more wear on the starter motor. In the long run, it's actually a form of protection.

[MasonAnn]

Back when I drove the older XTS, I used to look for the physical button with an 'A' near the gear shift to turn it off. I heard that after the 2018 model year, some versions moved it to the vehicle settings menu in the center console. I'd suggest checking your model year first—if you can't find the button, try turning the AC to max right after starting the car; sometimes the system will temporarily disable auto start-stop. If it really bothers you, you could search for an auto start-stop disabler on shopping platforms—installing a module can automatically turn it off. But if it involves wiring modifications, it’s safer to have a professional handle it.