Stop as soon as it's safered light
Coolant Temperature Warning
The engine is overheating — pull over before serious damage occurs.
What it means
On liquid-cooled bikes, this warns that coolant temperature has climbed above the safe operating range, risking damage to the head gasket, pistons or bearings if ignored.
What to do
Pull over safely and let the engine idle or switch off to cool. Never remove the coolant cap while hot. Check coolant level once cool, and don't continue riding if the light stays on after cooling and topping up.
Likely causes
- •Low coolant level
- •A failed radiator fan or thermostat
- •A blocked radiator, from debris or damaged fins
- •Water pump failure
Heads up: Exact symbols and behaviour vary by make and model — always check your owner's handbook, and speak to a qualified mechanic if you're unsure.