No, that just means your SID will move from say mpg over to temperature if it hits that range. They want you to know it is cold enough for ice and to be careful. Your temp sensor is busted or wiring to it is broken.
SaabCentral forum the most comprehensive Saab resource on the internet. Join our discussions on the Saab 9-3, Saab 9-5, Saab 900, Saab 9000 and all other Saab models, choose your forum.