Search violations
FMCSA SMS Appendix A + MCMIS catalog · 22 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.
22 results
Missing code? Submit it →Air Brake - Air compressor mounting bolts loose.
Air Brake - Air compressor mounting brackets/braces/adapters cracked/broken.
Air Brake - Air compressor mounting brackets have missing or loose mounting bolts.
Air Brake - Air compressor cracked/broken/loose pulley.
Air Brake - Air compressor drive belt pending or probable failure.
Brake - Audible air leak from a brake chamber
Air Brake - Fails air loss rate test.
Air Brake - Leaking air tank.
Air Brake - Air reservoir separated from its original attachment points or moving more than 1 inch
Hydraulic brake backup system is inoperative
Buses - Electrical components have broken or unsecured mounting.
Brakes - Hydraulic Brake Failure Light missing, inoperative, or stays activated
Hydraulic power brake unit is inoperative
Hydraulic Master Cylinder Less Than 1/4 Full on Hydraulic Brakes
Brake - Non-manufactured hole or crack in the spring brake housing section of a parking brake.
Hydraulic Power Assist Fails to Operate on Hydraulic Brakes
Brakes (general) Explain:
Bolt-type or DD-3 -type Brake Out of Adjustment
Brake-air compressor violation
Brake-defective brake drum
Brake system pressure loss
Brake - Defective brake(s) are equal to or greater than 20% of the service brakes on the vehicle/combination.
| Code ↑ | Description ↕ | Pts ↕ | OOS | ||
|---|---|---|---|---|---|
| 396.3A1-BACL | Air Brake - Air compressor mounting bolts loose. Vehicle Maintenance | Vehicle Maintenance | 4 | Non-OOS | View → |
| 396.3A1-BACM | Air Brake - Air compressor mounting brackets/braces/adapters cracked/broken. Vehicle Maintenance | Vehicle Maintenance | 4 | Non-OOS | View → |
| 396.3A1-BACM-L6 | Air Brake - Air compressor mounting brackets have missing or loose mounting bolts. Vehicle Maintenance | Vehicle Maintenance | 4 | Non-OOS | View → |
| 396.3A1-BACP | Air Brake - Air compressor cracked/broken/loose pulley. Vehicle Maintenance | Vehicle Maintenance | 4 | Non-OOS | View → |
| 396.3A1-BACPPF-L6 | Air Brake - Air compressor drive belt pending or probable failure. Vehicle Maintenance | Vehicle Maintenance | 4 | Non-OOS | View → |
| 396.3A1-BALAC | Brake - Audible air leak from a brake chamber Vehicle Maintenance | Vehicle Maintenance | 4 | Non-OOS | View → |
| 396.3A1-BALR | Air Brake - Fails air loss rate test. Vehicle Maintenance | Vehicle Maintenance | 4 | Non-OOS | View → |
| 396.3A1-BAR | Air Brake - Leaking air tank. Vehicle Maintenance | Vehicle Maintenance | 4 | Non-OOS | View → |
| 396.3A1-BARS | Air Brake - Air reservoir separated from its original attachment points or moving more than 1 inch Vehicle Maintenance | Vehicle Maintenance | 4 | Non-OOS | View → |
| 396.3A1-BBS | Hydraulic brake backup system is inoperative Vehicle Maintenance | Vehicle Maintenance | 4 | Non-OOS | View → |
| 396.3A1-BECI | Buses - Electrical components have broken or unsecured mounting. Vehicle Maintenance | Vehicle Maintenance | 3 | Non-OOS | View → |
| 396.3A1-BFL | Brakes - Hydraulic Brake Failure Light missing, inoperative, or stays activated Vehicle Maintenance | Vehicle Maintenance | 4 | Non-OOS | View → |
| 396.3A1-BHPB | Hydraulic power brake unit is inoperative Vehicle Maintenance | Vehicle Maintenance | 4 | Non-OOS | View → |
| 396.3A1-BMC | Hydraulic Master Cylinder Less Than 1/4 Full on Hydraulic Brakes Vehicle Maintenance | Vehicle Maintenance | 4 | Non-OOS | View → |
| 396.3A1-BNMH | Brake - Non-manufactured hole or crack in the spring brake housing section of a parking brake. Vehicle Maintenance | Vehicle Maintenance | 4 | Non-OOS | View → |
| 396.3A1-BPA | Hydraulic Power Assist Fails to Operate on Hydraulic Brakes Vehicle Maintenance | Vehicle Maintenance | 4 | Non-OOS | View → |
| 396.3A1B | Brakes (general) Explain: Vehicle Maintenance | Vehicle Maintenance | 4 | Non-OOS | View → |
| 396.3A1BA | Bolt-type or DD-3 -type Brake Out of Adjustment Vehicle Maintenance | Vehicle Maintenance | 4 | Non-OOS | View → |
| 396.3A1BC | Brake-air compressor violation Vehicle Maintenance | Vehicle Maintenance | 4 | Non-OOS | View → |
| 396.3A1BD | Brake-defective brake drum Vehicle Maintenance | Vehicle Maintenance | 4 | Non-OOS | View → |
| 396.3A1BL | Brake system pressure loss Vehicle Maintenance | Vehicle Maintenance | 4 | Non-OOS | View → |
| 396.3A1BOS | Brake - Defective brake(s) are equal to or greater than 20% of the service brakes on the vehicle/combination. Vehicle Maintenance | Vehicle Maintenance | 0 | 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
- 393.75(a)(3)
Tire-flat and/or audible air leak
- 392.2SLLSR
State/Local Laws - State registration/tag violation.
- 393.78
Wipers - Inoperative / missing / damaged wipers.
- 392.2
Violation of Local Laws - Explain:
- 393.95(f)
Emergency Equipment - Stopped vehicle warning devices missing or impr…
- 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
- 393.53(b)
CMV manufactured after 10/19/94 has an automatic airbrake adjustment …
- 393.75A3-TAOL
Tires - All others, leaking or inflation less than 50% of the maximum…
- 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