Honda PIONEER SXS500M 2020 Owner's Manual page 35

Indicators & Displays
Coolant temperature gauge failure:
If the coolant temperature system has an error, the coolant
temperature gauge will flash and appear in the display, and/or the
high coolant temperature indicator will turn on.
If this occurs, see your dealer as soon as possible.
coolant temperature gauge
28 Instruments & Controls
high coolant
temperature indicator