will 399.207(b) put my truck out of service?
No. Across our 13 million inspection records, 399.207(b) has never resulted in an out-of-service order—the OOS rate is 0.0%. All 52 citations in our database were issued without placing the vehicle out of service. This code is not OOS-eligible under FMCSA rules. You can typically continue operating after citation, but you should address the violation through the proper channels to avoid future enforcement action.