What 398.8C2-MW means in plain language
398.8C2-MW is a citation issued when a driver or vehicle fails to meet specific regulatory requirements under FMCSR Part 398. The violation focuses on compliance with applicable federal motor carrier standards in this narrow category.
While this code appears infrequently in roadside inspections, it carries real consequences for your safety record and your carrier's compliance profile. Understanding what triggered the citation—and what you can do to avoid it in the future—is essential whether you're an owner-operator or driving for a fleet.
What our enforcement data actually shows
Our inspection records show that 398.8C2-MW is one of the rarest violations in the FMCSR system. Across 13 million inspections in our database, we have recorded only 7 all-time citations for this code, ranked #2312 out of 3,036 FMCSR codes by citation volume.
In the last 12 months, 5 citations were issued nationwide. In the last 90 days, just 1 citation appeared in our records. Most importantly: the out-of-service (OOS) rate for 398.8C2-MW is 0.0%—meaning none of the 7 drivers cited were placed out of service. This contrasts sharply with the all-FMCSR average OOS rate of 31.4%, indicating that inspectors have consistently allowed drivers to continue operations after this violation.
The rarity of this citation and the zero OOS rate suggest that while the violation is real, it does not typically result in immediate roadside removal from service.
Who gets cited most
Over the last 180 days, citations for 398.8C2-MW have been concentrated in three states:
- Georgia: 2 citations, 0.0% OOS rate
- Kansas: 1 citation, 0.0% OOS rate
- New York: 1 citation, 0.0% OOS rate
All three states show a 0.0% out-of-service rate, meaning no variation in enforcement severity across these jurisdictions.
Our data shows fleets such as Dunai Auto LLC, United Tree Pro LLC, and PA Triple A Tree Service Inc each with 1 citation on record. Because citation counts are so low—no carrier has more than one—we cannot identify a pattern of repeat violations in any single operation.
How severe is this compared to similar codes
398.8C2-MW sits in a peer group that includes some of the most frequently cited FMCSR violations. For perspective:
- 376.11(d)(1) leads the peer category with 6,383 citations but maintains a 0.0% OOS rate—identical to 398.8C2-MW's severity handling.
- 999 (a catch-all category) accounts for 4,802 citations with a 12.1% OOS rate, more than twice the all-FMCSR average.
- 107.620(b) has issued 2,120 citations with a 0.2% OOS rate, slightly more severe than 398.8C2-MW but still well below average enforcement.
The data indicates that 398.8C2-MW is treated as a low-severity violation—comparable in enforcement outcome to 376.11(d)(1) and significantly less severe than category violations with OOS rates above 10%.
How to avoid it
Based on co-occurring violations in recent inspections, we identified three citations that appeared alongside 398.8C2-MW:
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Verify your CDL is current and valid. One inspection flagged a CDL issue (383.23A2-LCDLN) alongside 398.8C2-MW. Before each trip, confirm your license is not expired and matches your vehicle class.
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Understand road signs and signals in English. One co-occurring violation involved understanding highway traffic signs and signals (391.11B2-S). Refresh your knowledge of standard US traffic signs and ensure you can read and respond to them correctly, even if English is not your first language.
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Perform a thorough pre-trip inspection. The co-occurrence of equipment-related codes (390.201BI-MC) suggests that 398.8C2-MW may be tied to vehicle condition. Walk around your unit before departing: check lights, mirrors, brakes, tires, and coupling devices. Document any issues and report them to your dispatcher or maintenance team before moving the vehicle.
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If you drive a Volvo or common commercial truck, pay extra attention to compliance. Our data shows Volvo vehicles appeared in 2 of the 9 citations (VOLVO and VOLV entries). While this may reflect market prevalence, ensure your pre-trip is especially rigorous for these units.
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Know your carrier's safety policies. If you work for a larger fleet, ask about their specific 398.8C2-MW compliance protocols. With so few citations system-wide, your carrier may have targeted guidance you haven't seen.