will 385.415A1 put my truck out of service
No. Across our 13 million inspection records, 385.415A1 has never resulted in an out-of-service order. The 0.0% OOS rate for this code means inspectors are citing it as a warning-level or documentation issue, not a safety shutdown. Compare this to the 31.4% national average OOS rate across all FMCSR codes—this violation is far less severe in enforcement practice.