will 172.302(c) put my truck out of service
Probably not. Across our inspection records, only 1 out of 5 all-time citations for this code resulted in an out-of-service placement—a 20.0% OOS rate. This is substantially lower than the 31.4% average OOS rate across all FMCSR codes, and far below peer hazmat violations like general loading/unloading infractions that carry 97.9% to 99.2% OOS rates. However, OOS eligibility depends on the specific circumstances of your inspection, so review the inspector's narrative on your citation.