Will 172.602A put my truck out of service?
No. Across our inspection database, 172.602A has never resulted in an out-of-service placement. The 0.0% OOS rate on all 166 all-time citations means this code is a warning-level violation only—your truck stays legal to operate while you correct the emergency response documentation.
For context, the national average OOS rate across all FMCSR codes is 31.4%, so 172.602A is significantly less severe than most violations inspectors encounter.