What happens when cited for 172.336B? Direct answers on out-of-service risk, enforcement trends, and what drivers need to do next.
Ranks #2,113 of 3,146 FMCSR codes by citation frequency • OOS rate of 35.7% is in line with the FMCSR-wide average of 33.3%.
ID Numbers not properly displayed other than on placards
Direct answers grounded in TruckCodex inspection data
Not automatically. Across 14 all-time citations for 172.336B in our database, 5 resulted in out-of-service placement—a 35.7% OOS rate. That's higher than the 31.4% average across all FMCSR codes. Whether you're placed OOS depends on the inspector's judgment of the severity and the specific hazmat being transported. Check your inspection report for the detail code.
172.336B is relatively light. While placarding violations like 177.817(a) carry a 75.1% OOS rate, and general loading violations hit 97.9% to 99.2%, your citation sits at 35.7%—closer to placarding maintenance issues at 1.6% OOS. Our records show 172.336B ranked #2083 of 3,036 FMCSR codes by citation volume, making it uncommon but not severe in the hazmat enforcement landscape.
Very rare. Over the last 12 months, our data shows only 7 citations nationally for 172.336B, with just 1 in the last 90 days. The monthly trend shows sporadic enforcement: 2 citations in October 2025, then 1 each in April, May, August 2025, January, and March 2026. This violation is not a widespread enforcement priority.
Texas leads enforcement. In the last 180 days, Texas had 3 citations for 172.336B with 0 out-of-service placements (0.0% OOS rate). Our database does not show other states with citations in that window, making Texas the only jurisdiction we can identify for recent enforcement of this code.
Yes. If the inspection record is factually inaccurate—for example, if ID numbers were properly displayed and the inspector miscoded the finding—you can file a DataQs challenge with FMCSA within 90 days of the roadside inspection. You'll need to provide photos, maintenance logs, or other evidence. DataQs requests go to the state police or DOT agency that conducted the inspection for review.
Freightliners dominate the citation history. Across all-time records, FRHT (Freightliner) vehicles account for 6 of 14 total citations. Peterbilt (PTRB) has 3 citations, while Hyster (HYTR), Wanco (WANC), and several other makes each have 1–2 citations. This likely reflects the prevalence of these tractors in hazmat fleets rather than a defect pattern.
Both. FMCSA records citations at the vehicle level (your truck's record) and the carrier level (your company's record). The violation appears in your motor carrier's Compliance, Safety, and Accountability (CSA) profile under the Hazardous Materials Safety BASIC. It may affect your company's CSA score and your personal driving record if you're under a safety monitoring program.
Where 172.336B is most commonly cited (last 180 days)
TruckCodex aggregates official public-sector datasets. See the Source registry for dataset-level coverage and the Freshness log for last-import timestamps.
Census, SAFER, SMS, Licensing & Insurance (L&I), roadside inspections, crashes, and authority history.
Vehicle recall campaigns, defect investigations, and consumer safety complaints (SCRS).
Cross-border carrier registry and Canadian recall campaigns where applicable.
TruckCodex is an independent aggregator; it is not affiliated with FMCSA, NHTSA, EIA, or Transport Canada. Always verify compliance-critical information directly with the originating agency.