A cruise control symbol does not always mean the vehicle is holding a speed. Some displays distinguish between a system that is switched on and one with a speed set. Adaptive systems can add separate following-distance or availability messages.
Read the symbol together with the displayed speed and any accompanying message. Use your owner's manual to identify the exact state, and avoid cruise control when conditions do not allow safe use. For a recurring unavailable-system message, contact 12th Street Auto Care Center with its wording.