What puts trucks and drivers out of service?
The most frequent out-of-service violations in our indexed FMCSA inspection records, ranked by violation code.
All violation codes
Highest OOS count first. Codes with no recorded OOS occurrences appear last.
| Violation code | Description | OOS occurrences | All occurrences | Share of all OOS |
|---|---|---|---|---|
| 171.2F-HMGRMC | HM (General Requirements) - Transporting Hazardous Materials not in accordance with this part | 3 | 81 | 0.0% |
| 171.2K-HMGRMC | HM (General Requirements) - Representing vehicle with Hazardous Materials with none present. | 3 | 269 | 0.0% |
| 172.201A2 | Hazardous Materials description not printed legibly in English | 3 | 75 | 0.0% |
| 172.202A5-HMSPS | HM (Shipping Papers) - Shipper HM shipping paper does not list total quantity/unit of measure as required. | 3 | 356 | 0.0% |
| 172.300A-HMMC | HM (Markings) - Motor carrier permit/require a driver to operate a motor vehicle with a HM not marked as required. | 3 | 70 | 0.0% |
| 172.328A-HMM | HM (Markings) - Failing to offer or affix ID numbers to cargo tank as required. | 3 | 22 | 0.0% |
| 172.331A | Offeror fail to provide ID Numbers to motor carrier for other bulk packages | 3 | 4 | 0.0% |
| 172.504B | Dangerous placard violation | 3 | 29 | 0.0% |
| 172.505A-HMPS | HM (Placarding) - Improper placarding for subsidiary placard for poison inhalation hazard (PIH) as required. | 3 | 8 | 0.0% |
| 172.505C | Not placarded for subsidiary dangerous when wet | 3 | 4 | 0.0% |
| 172.516C1 | Placard not securely affixed or attached | 3 | 205 | 0.0% |
| 172.600C | Offer or transport without emergency response information | 3 | 870 | 0.0% |
| 173.24F2-HMBPVM | HM (Bulk Packages) - The internal valve is missing when required | 3 | 3 | 0.0% |
| 173.32 | QUALIF. OF PORTABLE TANKS | 3 | 3 | 0.0% |
| 173.36 | Large bulk packages general requirements | 3 | 3 | 0.0% |
| 177.801-HMHCNP | HM (Highway Carriage) - Driver accepted/transported HM not prepared in accordance with this Subchapter. Explain | 3 | 1,820 | 0.0% |
| 177.823A-HMPMCNP-L6-1 | HM (Placarding) - Any of the required placards for a category of material (hazard class or division) are missing. CVSA Inspection Bulletin 2017-03 - Display of GH | 3 | 423 | 0.0% |
| 177.839 | Improper transportation of Class 8 hazardous materials | 3 | 3 | 0.0% |
| 178.337-11A2 | Internal valve MC331 | 3 | 3 | 0.0% |
| 365.511 | MX Carrier - Mexican domiciled carrier operating a CMV in the U.S. with permanent operating authority without a current CVSA decal | 3 | 7 | 0.0% |
| 385.13A1-OOSOPHM | OOS Order - Motor carrier operating a CMV while an existing out-of-service order is in effect: UNSAT/UNFIT - Placarded HM | 3 | 3 | 0.0% |
| 387.7B3I-MC | Carrier - Mexican domiciled motor carrier permit/require a driver to operate a CMV in the commercial zone without certificate of registration in the vehicle. | 3 | 630 | 0.0% |
| 390.21A | Not marked in accordance with regulations | 3 | 25,703 | 0.0% |
| 390.21TE | Leased CMV - Failing to have the required information on the rental agreement when the lease is not more than 30 days. | 3 | 1,765 | 0.0% |
| 392.2FC | Following too close | 3 | 3,949 | 0.0% |
| 392.2-HOS | HOS (Local Law) - State/local hour of service violation. | 3 | 487 | 0.0% |
| 392.2-INAT | Driver- Inattentive or Distracted Driving | 3 | 13,983 | 0.0% |
| 392.2LV | Lane Restriction violation | 3 | 29,337 | 0.0% |
| 392.2-SLLSWZ | State/Local Laws - Speeding work/construction zone | 3 | 21,822 | 0.0% |
| 392.60A | Unauthorized passenger on board CMV | 3 | 1,055 | 0.0% |
| 393.110D-CRAMNS | Cargo (RAM) - Trupact-II package tiedown assembly(ies) not securely and adequately fastened to the vehicle | 3 | 6 | 0.0% |
| 393.112 | Tiedown not adjustable by driver | 3 | 467 | 0.0% |
| 393.112-C | Cargo - Tiedown not adjustable | 3 | 1,108 | 0.0% |
| 393.11A1-LCHL | Lighting - Lamps improper color, height, location. | 3 | 20,447 | 0.0% |
| 393.11TU | Truck-Tractor upper body corner requirements for retroreflective sheeting or reflex reflective material for vehicles manufactured after July 1997 | 3 | 30,190 | 0.0% |
| 393.124B | Insufficient working load limits for tiedowns on a group of concrete pipes | 3 | 4 | 0.0% |
| 393.126D2 | Empty intermodal container with more than 5 ft overhang when transported on vehicle other than container chassis vehicle | 3 | 3 | 0.0% |
| 393.136C1 | Use of synthetic webbing to secure boulder | 3 | 3 | 0.0% |
| 393.205A-WRTDC | Wheel/Rim - Tubeless demountable adapter cracked more than 3 inches | 3 | 3 | 0.0% |
| 393.43C-BVTV | Brake - Vacuum, towing vehicle unable to actuate trailer parking/emergency brakes manually | 3 | 135 | 0.0% |
| 393.47A-BCLMHE | Hydraulic/Electric Brake - Cracked/loose/missing lining/pad. | 3 | 96 | 0.0% |
| 393.50B | Failing to equip vehicle air brake system with adequate reserve capacity or reservoir | 3 | 90 | 0.0% |
| 393.55E-B | Air Brake - ABS malfunction lamp defective on trailers manufactured on or after March 1, 1998 | 3 | 134,162 | 0.0% |
| 393.60D | Windshield / Windows - Tinting permits less than 70% of light transmittance | 3 | 77,784 | 0.0% |
| 393.70A-CDIT | Coupling - Defective causing improper tracking | 3 | 85 | 0.0% |
| 393.70B1I-CDPBFL-LT20 | Coupling - Mounting plate or pivot bracket has 20% or less of the fasteners on either side missing/ineffective | 3 | 216 | 0.0% |
| 393.70B1II-CDBL | Coupling - Bolted upper coupler has any loose bolt | 3 | 188 | 0.0% |
| 393.70C-CDTMC-LT20 | Coupling - Turntable mounting, cracked less than 20% of weld/parent metal | 3 | 28 | 0.0% |
| 393.71H-CDDDC | Coupling - Driveaway, drawbar cracked | 3 | 3 | 0.0% |
| 393.71H-CDITB | Coupling - Improper tow-bar | 3 | 48 | 0.0% |
How to read this report
Each indexed violation identity counts once. Only a violation explicitly marked out of service contributes to the OOS count. Repeated copies are counted once; conflicting code or OOS values are excluded. Unknown flags remain in all occurrences but not in the OOS count. Missing codes appear as “Code not reported”.
These are violation counts, not unique inspections, trucks, drivers, or carrier-wide out-of-service orders. Coverage describes the currently indexed inspection dataset, not all historical FMCSA records. Frequencies do not establish crash causation or a carrier’s safety rating.
Unknown OOS flags: 112 · Conflicting records excluded: 0
FMCSA source data ↗