The "car" symbol indicates the the phone is in the hands free mode.
Unfortunately the User Guide does not detail how to enable/disable the feature. Presumably it is in either the Phone Settings, Call Settings or Enhancements area.
Also here is a link which describes how to solve a Nokia "hands free" problem if the settings indicate that it is in the hands free mode.
Sorry that I cannot be of more help.
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In my phone a symbol like⤴️ this occurred in the side of network sign