FMCSR 392.3: Operating While Ill or Fatigued — Q&A

Yes—almost certainly. Across our inspection records, 392.3 citations result in an out-of-service placement 98.0% of the time. That means if you're cited for operating while ill or fatigued, there's a 1,286 out of 1,312 chance your truck gets pulled from service immediately. This rate is dramatically higher than the all-FMCSR average of 31.4%, making 392.3 one of the most consistently enforceable violations in the database.

First: stop driving and notify your carrier—you'll likely be out of service on the spot. Second: document your condition (medical records, logs, medication). Third: review your duty status records closely, since our data shows 392.3 often appears alongside false record of duty status violations (395.8E) in the same inspection. Fourth: if you suspect the citation is in error, preserve all evidence (pre-trip logs, communications with dispatch, medical documentation) for a potential DataQs challenge within 90 days of the violation date.

Yes—392.3 is far more serious than its peer codes. While the broader 392.2 category has a 0.8% OOS rate, 392.3's 98.0% rate indicates inspectors cite this code only when they have strong evidence. Similar codes like 392.2-SLLSR (0.1% OOS) and 392.2RG (0.1% OOS) show enforcement is much lighter. This suggests 392.3 represents the most egregious documented cases and carries disproportionately severe consequences at roadside.

In the last 180 days, Illinois leads by far with 47 citations (95.7% OOS rate), followed by Iowa with 13 citations (100% OOS) and Texas with 9 citations (100% OOS). Across all three states, every citation except two in Illinois resulted in an immediate out-of-service order. If you operate in the upper Midwest or South, stay especially alert to fatigue management and pre-trip health assessments.

In the last 90 days, 392.3 most commonly appears with 392.2LC (operating while ill/fatigued) in 9 shared inspections, and with false record of duty status (395.8E) in 7 shared inspections. This pattern suggests inspectors cite 392.3 when they spot multiple red flags—not just fatigue, but also falsified logs. If you're cited for 392.3, assume auditors will scrutinize your entire record of duty status and hours of service compliance.

Citations are volatile month to month. In the last 12 months, May 2025 spiked to 22 citations, while July 2025 dropped to 9. Overall, 172 citations were issued in the last 12 months compared to 1,312 all-time, suggesting enforcement of 392.3 remains relatively rare but extremely serious when it occurs. The OOS rate stays consistently near 98% regardless of monthly volume.

All-time, Western Express Inc (USDOT 511412) leads with 10 citations, followed by XPO Logistics Freight Inc, Penske Logistics, UPS, and J.B. Hunt each with 6–7 citations. These represent major carriers across different freight types, so 392.3 is not confined to one business model. If you drive for a carrier on this list, your safety culture should emphasize fatigue management and medical fitness-for-duty protocols.

You can submit a DataQs (Request for Corrections of Safety Data) challenge if you believe the citation is factually incorrect. You have 90 days from the inspection date. However, 392.3 is a driver observation violation—inspectors base it on observed behavior (swerving, dozing, slow reaction), which is harder to refute than equipment defects. Success depends on contradictory evidence: dash cam footage, witness statements, or medical records proving you were fit to operate. Consult your company's safety team on likelihood before filing.