What causes the red light on the BYD F0 coolant temperature gauge?

[ArcherAnn]

BYD F0 coolant temperature gauge showing a red light is likely caused by low engine coolant level. The specific reasons are as follows: Reasons for the red coolant temperature light: One is insufficient coolant, which triggers the warning light. Another is engine overheating, which also activates the warning light. Driving is not recommended when the red light is on: When the coolant temperature gauge shows a red light, you should not continue to drive the vehicle. The red light indicates overheating, which can easily cause engine problems such as cylinder head gasket failure or excessive clearance between mechanical components. If you must continue driving, wait until the engine temperature drops and check whether the coolant level is sufficient.