FMCSR Violations for ISX Engines
Top FMCSA roadside inspection violation codes by occurrence count across all VINs with this engine model.
| # | Code | Description | Count |
|---|---|---|---|
| 1 | 392.2 | Violation of Local Laws - Explain: | 2,019 |
| 2 | 393.9(a) | Inoperable required lamps | 809 |
| 3 | 396.17C-PI | Operating a CMV without documentation of a periodic inspection. | 349 |
| 4 | 392.2-SLLSR | State/Local Laws - State registration/tag violation. | 347 |
| 5 | 393.47E | Brake Out of Adjustment - Roto, Clamp (Short & Long), DD-3, or Bolt | 340 |
| 6 | 396.17(c) | Operating a CMV without proof of a periodic inspection | 302 |
| 7 | 396.3(a)(1) | Inspection, repair and maintenance of parts and accessories | 282 |
| 8 | 393.47(e) | Brake Out of Adjustment - Roto, Clamp (Short & Long), DD-3, or Bolt | 280 |
| 9 | 393.45(b)(2) | Brake hose or tubing chafing and/or kinking | 241 |
| 10 | 393.78 | Wipers - Inoperative / missing / damaged wipers. | 240 |
| 11 | 393.9A-LIL | Lighting - Identification lamp(s) inoperative. | 222 |
| 12 | 393.75A3-TAOL | Tires - All others, leaking or inflation less than 50% of the maximum inflation pressure. | 217 |
| 13 | 393.11 | No or defective lighting devices or reflective material as required | 168 |
| 14 | 393.45D-B | Air Brake - Audible air leak at a proper connection. | 166 |
| 15 | 392.2-SLLEWA3 | State/Local Laws - Excessive weight - More than 5000 lbs over on an axle/axle groups. | 161 |
| 16 | 393.9 | Inoperable Required Lamp | 157 |
| 17 | 393.75(g) | 393.75(g) | 152 |
| 18 | 393.53(b) | CMV manufactured after 10/19/94 has an automatic airbrake adjustment system that fails to compensate for wear | 151 |
| 19 | 392.2-SLLEWA1 | State/Local Laws - Excessive weight - 1-2500 lbs over on an axle/axle groups. | 149 |
| 20 | 392.2-SLL | State/Local Laws - | 147 |
Carriers most-often inspected with this engine
Top 10 fleets ranked by distinct FMCSA roadside inspections that included a vehicle reporting an ISX engine.
| # | Carrier | Inspections |
|---|---|---|
| 1 | REDWOOD COAST TRUCKING INC | 76 |
| 2 | FAIRBANKS SCALES INC | 49 |
| 3 | TRIPLE S TRUCKING COMPANY INC | 49 |
| 4 | UNIVERSAL ENVIRONMENTAL SERVICES LLC | 43 |
| 5 | R B BROWNS TRUCKING INC | 36 |
| 6 | JHONATAN TRUCKING LLC | 35 |
| 7 | THOMAS H IRELAND INC | 32 |
| 8 | PACIFIC HIDE & FUR DEPOT INC | 31 |
| 9 | C W ROBERTS CONTRACTING INC | 30 |
| 10 | Y O Y TRUCKING LLC | 25 |
Methodology
Counts represent the number of ViolationEvent rows in FMCSA inspection records where a vehicle with a ISX engine was present on the same inspection. The linkage is: VINRecord (engine_model = “ISX”) → VINRecord.vin → InspectionUnit.vin → ViolationEvent.inspection_id.
This is a co-occurrence count, not a causal attribution. Many of the top codes (brake systems, lighting, hours of service) are common across all heavy-truck inspections. The engine model does not cause most of these violations. Where an engine-specific violation does appear high in the list (emissions, fluid leaks, EGR-related codes), it may reflect a pattern tied to that powertrain. Always verify against current FMCSR regulations before drawing compliance conclusions. “% of Top 20” is computed against the sum of the top-20 violation counts shown, not all violations for this engine.