I agree with "Ricko", especially if you drove through some bad weather or muddy roads for any distance. Get a good spray nozzle and rinse down the back side of each wheel. If this doesn't cure it, take a moment to look for anything out of whack on the back of the wheels. Sensors can be knocked out of place.
If the problem gets corrected, the light should clear.
If you have the Freightliner dash that shows information in the window, you can scroll through to the diagnostic window and look for codes.
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Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2019 Ford Raptor
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