TruckCodex

393.9A-LRLI — Inoperable required lamps

FMCSA violation code under Vehicle Maintenance. 36,100 events recorded in roadside inspections. Severity weight: 3.

Severity Weight
3
OOS Eligible
No
BASIC Category
Vehicle Maintenance
Total Events
36,100
Code
393.9A-LRLI
Code System
FMCSR
BASIC Category
Vehicle Maintenance
OOS Eligible
No
Severity Weight
3
Violation Group
—
Total Events
36,100
Carriers Cited
26,951

Violation Description

Operating a commercial motor vehicle with inoperable required lamps.

About This Violation Code

Code 393.9A-LRLI falls under the Vehicle Maintenance BASIC category in FMCSA's Safety Measurement System (SMS). It carries a severity weight of 3 (scale 1-10, higher = more severe).

When this violation is cited during a roadside inspection, it contributes to the carrier's Vehicle Maintenance BASIC score. Carriers with high BASIC percentiles may be prioritized for FMCSA interventions including warning letters, investigations, or compliance reviews.

Regulatory Reference

Federal Motor Carrier Safety Regulations

This violation references 49 CFR 393.9A in the Federal Motor Carrier Safety Regulations.

View on eCFR.gov →FMCSA Violations Search →
Events (all time)
36,100
OOS Events
303
OOS Rate
0.8%
Top State (180d)
Michigan
812 events

Top Enforcing States

Where 393.9A-LRLI is most commonly cited (last 180 days)

1.Michigan
812
OOS 1.1%
2.New York
712
OOS 0.0%
3.California
691
OOS 6.8%
4.Missouri
671
OOS 0.0%
5.Ohio
578
OOS 0.0%
6.Washington
569
OOS 0.0%
7.US
363
OOS 0.0%
8.Maryland
360
OOS 0.0%
9.Pennsylvania
355
OOS 0.0%
10.Kansas
355
OOS 0.0%
11.Arizona
335
OOS 0.0%
12.Wisconsin
318
OOS 0.0%
13.Georgia
296
OOS 0.0%
14.Florida
281
OOS 0.0%
15.South Carolina
276
OOS 0.0%

Click a state to see roadside inspection activity, top stations, and carrier profiles in that jurisdiction.

Citation Trend (12 months)

Monthly count of 393.9A-LRLI citations. Red bars mark months with OOS-triggering citations.

906
Apr
1,974
May
1,788
Jun
1,911
Jul
1,943
Aug
1,853
Sep
1,618
Oct
1,347
Nov
1,698
Dec
1,918
Jan
2,270
Feb
2,319
Mar
114
Apr

Most Active Stations

Inspection stations citing 393.9A-LRLI most often (last 180 days)

1.MONROE SCALE N/B
221
OOS 0.0%
2.NJ
126
OOS 0.8%
3.LAREDO TX
112
OOS 0.0%
4.PA
80
OOS 0.0%
5.BOW WA
80
OOS 0.0%
6.KS
71
OOS 0.0%
7.GRANDVIEW WA
69
OOS 0.0%
8.ST CLAIR MO
66
OOS 0.0%
9.ST. LOUIS MO
61
OOS 0.0%
10.PLEASANT PRAIRIE WI
61
OOS 0.0%

Often Cited Together

Other violations commonly found on the same inspection (last 90 days)

393.9A-LIL1,293 co-occurrences396.17C-PI1,289 co-occurrences393.9A-LSLI1,173 co-occurrences393.9A-LTSI881 co-occurrences393.9A-LSML808 co-occurrences392.2-SLLSR795 co-occurrences393.9A-LCL779 co-occurrences393.9A-LTSIR776 co-occurrences393.75A3-TAOL680 co-occurrences393.9A-LLPL660 co-occurrences

Citation patterns suggest related root causes (e.g., HOS violations paired with logbook errors).

Top Carriers Cited

Ranked by frequency • 26,951 carriers total • Page 1 of 1079

Top Carriers with 393.9A-LRLI Violations

Showing 25 of 26,951

fmcsa-violations
Top Carriers with 393.9A-LRLI Violations
#CarrierUSDOT# Violations
#1FEDERAL EXPRESS CORPORATION8687684
#2EVANS DELIVERY COMPANY INC3811171
#3WESTERN EXPRESS INC51141269
#4SWIFT TRANSPORTATION CO OF ARIZONA LLC5428359
#5J B HUNT TRANSPORT INC8080645
#6SAKARA LLC442953031
#7CENTRAL TRANSPORT LLC66117330
#8ESTES EXPRESS LINES12101830
#9NEW PRIME INC370630
#10SCHNEIDER NATIONAL CARRIERS INC26418429
#11UNITED PARCEL SERVICE INC2180028
#12AUTO HAUL EXPRESS LLC432932527
#13MR BULT'S INC38710223
#14SUPLICIUM TRANSPORT LLC438125522
#15TRYTIME TRANSPORT LLC199466422
#16KORAIMA EVELYN GRIJALVA DE LA ROSA374793422
#17WERNER ENTERPRISES INC5346721
#18GREENWOOD MOTOR LINES INC6339121
#19ABF FREIGHT SYSTEM INC8286621
#20CLOUDTRUCKS LLC330031821
#21MERCER TRANSPORTATION CO INC15471221
#22IMC LOGISTICS LLC29299120
#23KNIGHT TRANSPORTATION INC42882320
#24P&S TRANSPORTATION LLC124333819
#25RTS HOLDINGS LLC236530819

Recent Inspections

Latest inspections where 393.9A-LRLI was cited • 36,100 total events • Page 1 of 1444

Recent Inspections with 393.9A-LRLI

Showing 25 of 36,100

fmcsa-inspections
Recent Inspections with 393.9A-LRLI
DateReport #StateLevelOOS
Apr 3, 202687486929MILevel 2No
Apr 3, 202687485407SDLevel 2No
Apr 3, 202687486872MILevel 2No
Apr 3, 202687488805CALevel 5No
Apr 3, 202687485448MOLevel 2No
Apr 3, 202687485532KSLevel 2No
Apr 3, 202687485218ALLevel 2No
Apr 3, 202687485249USLevel 1No
Apr 3, 202687486695OKLevel 1No
Apr 3, 202687485244MOLevel 1No
Apr 3, 202687486690OKLevel 2No
Apr 3, 202687485430MTLevel 2No
Apr 3, 202687485219ALLevel 1No
Apr 2, 202687481290CALevel 2No
Apr 2, 202687486857MILevel 2No
Apr 2, 202687486844MILevel 2No
Apr 2, 202687484591MDLevel 2No
Apr 2, 202687487028WYLevel 2No
Apr 2, 202687487002NELevel 1No
Apr 2, 202687476400UTLevel 1No
Apr 2, 202687486688OKLevel 2No
Apr 2, 202687484625OHLevel 2No
Apr 2, 202687476751MALevel 1No
Apr 2, 202687486899MILevel 2No
Apr 2, 202687484893USLevel 1No

Data sources & freshness

FMCSA Vehicle Inspections and Violations
Unknown freshness
Federal Motor Carrier Safety Regulations (49 CFR)
Unknown freshness

Related records

CategoryAll Vehicle Maintenance Violations
Browse all violation codes in the Vehicle Maintenance BASIC
IndexAll Violation Codes
FMCSR violation codes by BASIC category
ReferenceFMCSA Roadside Inspections
Inspection levels and procedures
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