Will a 393.88 citation put my truck out of service?
No. Across our 13 million inspection records, 393.88 citations result in an out-of-service placement only 0.1% of the time—just 1 OOS out of 1,550 total citations. For context, the national average OOS rate across all FMCSR codes is 31.4%, so this violation is far less likely to sideline your truck. Most drivers receive a citation and can continue operating.