The tires have a residual tread pattern height of 1.6 mm.✓Respuesta correcta
Engine coolant temperature gauge does not work.
In both cases.
Explicación
Bus tyres require more tread than 1.6 mm, so that measurement is below the permitted operating threshold. A coolant-temperature gauge reports engine temperature, but failure of that indicator alone does not meet the tyre threshold or constitute a separate operating prohibition.