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- 2021 CX-9 Sig
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- 2021 CX-5 GT
Does a few things but cylinder deactivation afaik completely independent of button and just reads/responds to load and tells you when your down cylinders with the eco dash light..
"How Does Eco Mode Work?
When you press the Eco button to activate Eco mode, your car will adjust its behavior in a few different ways, all meant to improve gas mileage and help you drive more efficiently:
Gentler throttle – When you press the gas pedal, the throttle will open more slowly in order to use less gas.
More efficient shifting pattern – In vehicles with an automatic transmission, the car will shift into higher gears sooner than in normal driving mode. In models with a manual transmission, activating Eco mode will make the vehicle’s display screen indicate when to shift gears for maximum efficiency.
More efficient air conditioning – In Eco mode, your car will save on power by limiting how long the air conditioner will run."
Thanks. Our car has something called variable cylinder management, which I always assumed was the turning off of two cylinders for cruising.