Violation code

171.2K-HMGRMC

HM (General Requirements) - Representing vehicle with Hazardous Materials with none present.

Hazardous Materials Compliance5Non-OOS· SMS Appendix A v3.20

171.2K-HMGRMC is a Markings - HM violation under 49 CFR §171.2K-HMGRMC. It falls in the Hazardous Materials Compliance BASIC with a severity weight of 5/10. Nationally it was cited 259 times in the last five years, with an OOS rate of 1.2%.

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National roadside inspection stats

as of 7/20/2026

Inspections

257

that found this code

Violations

259

total written

OOS rate

1.2%

3 OOS

Source: FMCSA roadside inspection data (last 5 years). The OOS rate is the share of these violations that led the officer to mark the driver or vehicle out of service.

Violation group: Markings - HM
Regulation §: 171.2K-HMGRMC
Severity weight: 5
Used in SMS: Yes
Status: Active
Updated: 7/20/2026

Last updated July 2026

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Notes

DSMS: Y | Comment: Added in 3.20 | Footnote: This violation was added to SMS with the July 25, 2025 snapshot.

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Challenging 171.2K-HMGRMC through FMCSA DataQs

If this violation was written incorrectly, here are the angles trucking-safety managers use to contest it. Playbook: Hazardous Materials.

Common ways to challenge this code

Shipment was not placardable
The materials transported did not exceed the threshold quantities requiring placards under 49 CFR Part 172 Subpart F.
Evidence that wins
- ✓Shipping papers showing UN number, hazard class, and quantity
- ✓Manufacturer's product specification sheet
Administrative HazMat code (not in SMS)
This administrative code is on the inspection report but does not contribute to CSA BASIC scoring per FMCSA SMS Methodology Appendix A.
Evidence that wins
- ✓FMCSA SMS Methodology Appendix A reference

Common pitfalls — avoid these

⚠Administrative HazMat codes still appear on the PSP record even when not scored in SMS

⚡ Draft a challenge for 171.2K-HMGRMC →Read the DataQs guide first

More codes in Hazardous Materials Compliance

Same BASIC category — ranked by national citation volume

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Other Markings - HM codes

Codes under the same FMCSA violation group

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Frequently asked questions about 171.2K-HMGRMC

What does violation 171.2K-HMGRMC mean?

171.2K-HMGRMC is the FMCSA roadside-inspection violation code for "HM (General Requirements) - Representing vehicle with Hazardous Materials with none present.", part of the Markings - HM group, cited under 49 CFR §171.2K-HMGRMC.

What BASIC does 171.2K-HMGRMC affect?

171.2K-HMGRMC falls under the Hazardous Materials Compliance BASIC in the FMCSA Safety Measurement System (SMS).

What is the CSA severity weight of 171.2K-HMGRMC?

171.2K-HMGRMC carries a severity weight of 5 out of 10. Higher weights indicate violations more closely tied to crash risk, and they count more toward a carrier's Hazardous Materials Compliance score.

Is 171.2K-HMGRMC an out-of-service (OOS) violation?

No. 171.2K-HMGRMC is not an out-of-service violation, so on its own it does not trigger an out-of-service order at the roadside.

How many CSA points does 171.2K-HMGRMC add to a carrier's score?

The point contribution of 171.2K-HMGRMC depends on its severity weight (5/10) multiplied by a time weight of 3, 2, or 1 based on how recent the inspection is. You can calculate the exact contribution with the CSA points calculator.

Can 171.2K-HMGRMC be challenged through DataQs?

Yes. If you believe 171.2K-HMGRMC was recorded in error, you can file a Request for Data Review (RDR) through the FMCSA DataQs system with supporting evidence. A successful challenge can remove or correct the violation on your record.

Keep going

CSA points calculator How to challenge a violation Draft a DataQs letter for 171.2K-HMGRMC Hazardous Materials Compliance BASIC Carrier CSA lookup CSA glossary

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