That was my first thought too. tknight suggested the overflow reservoir may be low, and I don't know where the sensor is on these. I'll tell them to have that sensor in radiator checked. Thanks
Hey greasytshirt,
A friend of mine has a 2007 Hino, not sure of model. Is there a low coolant sensor on these? They say a loud alarm for low coolant sounds from the dash only when turning to the right. And the radiator is full. Any ideas? Thanks.