Will 397.11(b) put my truck out of service?
No. Across our inspection records, the 0.0% out-of-service rate for 397.11(b) means this citation does not trigger an immediate vehicle shutdown. For context, the national average OOS rate across all FMCSR codes is 31.4%, so 397.11(b) is significantly less likely to result in an out-of-service order. However, being cited is still a compliance mark on your record—address the underlying issue promptly to avoid escalation.