Volkswagen Golf GTI 2016, Owner'S Manual

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The tread circumference of a tire can change:
If a tire's inflation pressure is too low.
If the tire's tread is damaged or the tire is structurally damaged.
If one side of the vehicle is more heavily loaded than the other.
If there is more weight on one axle than the other (such as when
towing a trailer).
If a compact spare wheel has been mounted.
If a wheel was replaced on each axle.
If a tire was changed.
If the tire pressure was changed, or wheels were rotated or
replaced, but the TPMS was not reset.
If there are snow chains on the tires. Using snow chains can
cause the system to give false warnings because snow chains
increase tire circumference.
The Tire Pressure Monitoring System may not react at first or may
not react at all when you are driving in a sporty manner, or on snow-
covered or unpaved roads, when you are driving with snow chains,
or in certain other situations. A change in the tread circumference of
a tire is signaled by the Tire Pressure Monitoring System indicator
in the instrument cluster (telltale).