Join Date: Jul 2007
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my sat nav did this. The red satellite icon does mean that there is no signal from the aerial. The carminat also has a secondary system that measures the vehicles speed and turn angle, so that it still tracks in tunnels etc. This is probably how your system is still working, so you're probably ok.
Currently in squeak142's garage:
2006 Peugeot 207 GT HDi. Did own 2001 Laguna dCi