Search violations
FMCSA SMS Appendix A + MCMIS catalog · 90 codes
Search any FMCSA violation code from the SMS Methodology (Appendix A) by code, keyword, or BASIC category. Every entry shows the CSA severity weight (points), whether the violation is out-of-service (OOS) eligible, and which of the seven BASICs it counts against — including codes that appear on roadside inspections but aren't used in SMS scoring.
90 results
Missing code? Submit it →Fifth wheel
Defective coupling device-improper tracking
Defective/improper fifth wheel assemblies
Defective fifth wheel locking mechanism
Defective coupling devices for full trailer
No or improper safety chains or cables for full trailer
Improper safety chain attachment
Coupling - Upper coupler is cracked 20% or less of the distance across the metal in the direction of the crack.
Coupling - Upper coupler is cracked more than 20% of the distance across the metal in the direction of the crack.
Coupling - Defective causing improper tracking.
Defective latching fasteners - Fasteners on either side of the vehicle are missing or ineffective
Fifth wheel cracked or a gap caused by corrosion 1/8 inch (3.2 mm) or more in width.
Coupling - A crack, or gap caused by corrosion that is 1/8 inch or more in width.
Coupling - A crack, or gap caused by corrosion.
Coupling - 20% or less of the total original welds are cracked on either side of the vehicle.
Coupling - More than 20% of the total original welds are cracked on either side of the vehicle.
Coupling - Sliding fifth wheel fore/aft stop is missing/not secured.
Coupling - Less than 20% of the fifth wheel mounting angle iron cracked/broken.
Coupling - 20% or more of the fifth wheel mounting angle iron cracked/broken.
Coupling - 20% or less of the fifth wheel fasteners on either side missing/ineffective.
Coupling - More than 20% of the fifth wheel fasteners on either side missing/ineffective.
Coupling - Movement of the fifth wheel mounting components.
Coupling - Mounting plate or pivot bracket has 20% or less of the total original welds are cracked on either side of the vehicle.
Coupling - Mounting plate or pivot bracket has more than 20% of the total original welds are cracked on either side of the vehicle.
Coupling - Mounting plate or pivot bracket is cracked 20% or less of the distance across the metal in the direction of the crack.
| Code ↑ | Description ↕ | Pts ↕ | OOS | ||
|---|---|---|---|---|---|
| 393.70 | Fifth wheel Vehicle Maintenance | Vehicle Maintenance | 3 | Non-OOS | View → |
| 393.70(a) | Defective coupling device-improper tracking Vehicle Maintenance | Vehicle Maintenance | 3 | Non-OOS | View → |
| 393.70(b) | Defective/improper fifth wheel assemblies Vehicle Maintenance | Vehicle Maintenance | 3 | Non-OOS | View → |
| 393.70(b)(2) | Defective fifth wheel locking mechanism Vehicle Maintenance | Vehicle Maintenance | 3 | Non-OOS | View → |
| 393.70(c) | Defective coupling devices for full trailer Vehicle Maintenance | Vehicle Maintenance | 3 | Non-OOS | View → |
| 393.70(d) | No or improper safety chains or cables for full trailer Vehicle Maintenance | Vehicle Maintenance | 3 | Non-OOS | View → |
| 393.70(d)(8) | Improper safety chain attachment Vehicle Maintenance | Vehicle Maintenance | 3 | Non-OOS | View → |
| 393.701II-CDUCC-LT20 | Coupling - Upper coupler is cracked 20% or less of the distance across the metal in the direction of the crack. Vehicle Maintenance | Vehicle Maintenance | 3 | Non-OOS | View → |
| 393.701II-CDUCC-MT20 | Coupling - Upper coupler is cracked more than 20% of the distance across the metal in the direction of the crack. Vehicle Maintenance | Vehicle Maintenance | 3 | Non-OOS | View → |
| 393.70A-CDIT | Coupling - Defective causing improper tracking. Vehicle Maintenance | Vehicle Maintenance | 3 | Non-OOS | View → |
| 393.70B1I | Defective latching fasteners - Fasteners on either side of the vehicle are missing or ineffective Vehicle Maintenance | Vehicle Maintenance | 3 | Non-OOS | View → |
| 393.70B1I-C | Fifth wheel cracked or a gap caused by corrosion 1/8 inch (3.2 mm) or more in width. Vehicle Maintenance | Vehicle Maintenance | 3 | Non-OOS | View → |
| 393.70B1I-CDCG-18 | Coupling - A crack, or gap caused by corrosion that is 1/8 inch or more in width. Vehicle Maintenance | Vehicle Maintenance | 3 | Non-OOS | View → |
| 393.70B1I-CDCG-L6 | Coupling - A crack, or gap caused by corrosion. Vehicle Maintenance | Vehicle Maintenance | 3 | Non-OOS | View → |
| 393.70B1I-CDCW-LT20 | Coupling - 20% or less of the total original welds are cracked on either side of the vehicle. Vehicle Maintenance | Vehicle Maintenance | 3 | Non-OOS | View → |
| 393.70B1I-CDCW-M20 | Coupling - More than 20% of the total original welds are cracked on either side of the vehicle. Vehicle Maintenance | Vehicle Maintenance | 3 | Non-OOS | View → |
| 393.70B1I-CDFAM | Coupling - Sliding fifth wheel fore/aft stop is missing/not secured. Vehicle Maintenance | Vehicle Maintenance | 3 | Non-OOS | View → |
| 393.70B1I-CDFWC-LT20 | Coupling - Less than 20% of the fifth wheel mounting angle iron cracked/broken. Vehicle Maintenance | Vehicle Maintenance | 3 | Non-OOS | View → |
| 393.70B1I-CDFWC-MT20 | Coupling - 20% or more of the fifth wheel mounting angle iron cracked/broken. Vehicle Maintenance | Vehicle Maintenance | 3 | Non-OOS | View → |
| 393.70B1I-CDFWFMI-LT20 | Coupling - 20% or less of the fifth wheel fasteners on either side missing/ineffective. Vehicle Maintenance | Vehicle Maintenance | 3 | Non-OOS | View → |
| 393.70B1I-CDFWFMI-MT20 | Coupling - More than 20% of the fifth wheel fasteners on either side missing/ineffective. Vehicle Maintenance | Vehicle Maintenance | 3 | Non-OOS | View → |
| 393.70B1I-CDMFW | Coupling - Movement of the fifth wheel mounting components. Vehicle Maintenance | Vehicle Maintenance | 3 | Non-OOS | View → |
| 393.70B1I-CDPB-LT20 | Coupling - Mounting plate or pivot bracket has 20% or less of the total original welds are cracked on either side of the vehicle. Vehicle Maintenance | Vehicle Maintenance | 3 | Non-OOS | View → |
| 393.70B1I-CDPB-M20 | Coupling - Mounting plate or pivot bracket has more than 20% of the total original welds are cracked on either side of the vehicle. Vehicle Maintenance | Vehicle Maintenance | 3 | Non-OOS | View → |
| 393.70B1I-CDPBC-LT20 | Coupling - Mounting plate or pivot bracket is cracked 20% or less of the distance across the metal in the direction of the crack. Vehicle Maintenance | Vehicle Maintenance | 3 | Non-OOS | View → |
Statistics
Most-cited violation codes
Ranked by roadside-inspection citation count across FMCSA public data.
- 393.9
Inoperable Required Lamp
- 392.2RG
State vehicle registration or License Plate violation
- 393.47(e)
Brake Out of Adjustment - Roto, Clamp (Short & Long), DD-3, or Bolt
- 396.17(c)
Operating a CMV without proof of a periodic inspection
- 396.17C-PI
Operating a CMV without documentation of a periodic inspection.
- 393.95(a)
No/discharged/unsecured fire extinguisher
- 393.9TS
Inoperative turn signal
- 392.2SLLSR
State/Local Laws - State registration/tag violation.
- 393.75(a)(3)
Tire-flat and/or audible air leak
- 393.78
Wipers - Inoperative / missing / damaged wipers.
- 393.95(f)
Emergency Equipment - Stopped vehicle warning devices missing or impr…
- 392.2
Violation of Local Laws - Explain:
- 392.2-SLLS2
State/Local Laws - Speeding 6-10 miles per hour over the speed limit.
- 396.3A1BOS
Brake - Defective brake(s) are equal to or greater than 20% of the se…
- 393.11
No or defective lighting devices or reflective material as required
- 396.3(a)(1)
Inspection, repair and maintenance of parts and accessories
- 393.75A3-TAOL
Tires - All others, leaking or inflation less than 50% of the maximum…
- 393.53(b)
CMV manufactured after 10/19/94 has an automatic airbrake adjustment …
- 393.75(c)
Tire-other tread depth less than 2/32 of inch measured in a major tre…
- 393.60(c)
Windshield - Damaged or Discolored