TruckCodex

393.9A-LSML — Inoperable required lamps

FMCSA violation code under Vehicle Maintenance. 48,457 events recorded in roadside inspections. Severity weight: 3.

Severity Weight
3
OOS Eligible
No
BASIC Category
Vehicle Maintenance
Total Events
48,457
Code
393.9A-LSML
Code System
FMCSR
BASIC Category
Vehicle Maintenance
OOS Eligible
No
Severity Weight
3
Violation Group
—
Total Events
48,457
Carriers Cited
32,265

Violation Description

Operating a commercial motor vehicle with inoperable required lamps.

About This Violation Code

Code 393.9A-LSML 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)
48,457
OOS Events
2
OOS Rate
0.0%
Top State (180d)
California
2,034 events

Top Enforcing States

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

1.California
2,034
OOS 0.1%
2.Florida
1,327
OOS 0.0%
3.New York
889
OOS 0.0%
4.US
807
OOS 0.0%
5.Alabama
614
OOS 0.0%
6.Georgia
496
OOS 0.0%
7.Ohio
427
OOS 0.0%
8.New Jersey
427
OOS 0.0%
9.Utah
425
OOS 0.0%
10.Wisconsin
411
OOS 0.0%
11.Arizona
407
OOS 0.0%
12.Missouri
405
OOS 0.0%
13.Washington
377
OOS 0.0%
14.Pennsylvania
367
OOS 0.0%
15.Connecticut
321
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-LSML citations. Red bars mark months with OOS-triggering citations.

1,311
Apr
2,783
May
2,604
Jun
2,768
Jul
2,845
Aug
2,795
Sep
2,701
Oct
2,070
Nov
2,108
Dec
2,144
Jan
2,302
Feb
2,718
Mar
132
Apr

Most Active Stations

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

1.NJ
275
OOS 0.0%
2.BROWNSVILLE TX
211
OOS 0.0%
3.LAREDO TX
174
OOS 0.0%
4.DESERT HILLS IF
169
OOS 0.0%
5.MT. PASS IF
160
OOS 0.0%
6.NOGALES AZ
146
OOS 0.0%
7.PUNTA GORDA FL
113
OOS 0.0%
8.DOUGLAS AZ
110
OOS 0.0%
9.SIDEWINDER PLATFORM SCALE
98
OOS 0.0%
10.PLEASANT PRAIRIE WI
90
OOS 0.0%

Often Cited Together

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

393.9A-LIL1,916 co-occurrences396.17C-PI1,540 co-occurrences392.2-SLLSR1,240 co-occurrences393.9A-LCL1,164 co-occurrences393.9A-LLPL929 co-occurrences393.9A-LRLI769 co-occurrences393.75A3-TAOL717 co-occurrences393.55E-B671 co-occurrences393.75C-TAOTD-LT2/32639 co-occurrences393.78A-WS631 co-occurrences

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

Top Carriers Cited

Ranked by frequency • 32,265 carriers total • Page 1 of 1291

Top Carriers with 393.9A-LSML Violations

Showing 25 of 32,265

fmcsa-violations
Top Carriers with 393.9A-LSML Violations
#CarrierUSDOT# Violations
#1SWIFT TRANSPORTATION CO OF ARIZONA LLC5428384
#2TRANSPORTE INTERNACIONAL LOPEZ OCHOA SA DE C V104190783
#3ALFONSO GRIJALVA GRACIA98885777
#4KORAIMA EVELYN GRIJALVA DE LA ROSA374793475
#5WESTERN EXPRESS INC51141274
#6J B HUNT TRANSPORT INC8080673
#7FEDERAL EXPRESS CORPORATION8687668
#8RUBEN CARLOS TREVINO SANCHEZ164968963
#9DANIEL ERNESTO PENA COTA164763962
#10EVANS DELIVERY COMPANY INC3811156
#11JESUS PEDRO PEREZ CARRILLO115985152
#12OCTAVIO ANDRADE CORELLA55844051
#13UNITED PARCEL SERVICE INC2180051
#14LIPSA TRANSPORTES SA DE CV258414450
#15TRANSPORTES EMMA S DE RL DE CV66475647
#16LAZARO TERAN QUIROZ206823345
#17RICARDO ANDRES PENA COTA59135744
#18AUTOTRANSPORTES FRONTERIZOS MG SA DE CV177053441
#19TRANSPORTE INTERNACIONAL JONICK LOPEZ SA DE CV82098139
#20AUTOTRANSPORTES ROMEDU SA DE CV114825939
#21MARIO R GRIJALVA83704437
#22ALMA LUZ SANTOS SALDIVAR180607136
#23TRANSPORTES DE CARGA SAUL SALINAS SA DE CV55767635
#24BULLET TRANSPORT SERVICES MX S DE RL DE CV240309232
#25CENTRAL TRANSPORT LLC66117331

Recent Inspections

Latest inspections where 393.9A-LSML was cited • 48,457 total events • Page 1 of 1939

Recent Inspections with 393.9A-LSML

Showing 25 of 48,457

fmcsa-inspections
Recent Inspections with 393.9A-LSML
DateReport #StateLevelOOS
Apr 3, 202687489424CALevel 2No
Apr 3, 202687489461CALevel 5No
Apr 3, 202687485532KSLevel 2No
Apr 3, 202687485259MOLevel 2No
Apr 3, 202687485185MOLevel 2No
Apr 3, 202687485271ALLevel 2No
Apr 3, 202687484644ALLevel 2No
Apr 3, 202687488764CALevel 1No
Apr 3, 202687485653MALevel 2No
Apr 2, 202687480557CALevel 1No
Apr 2, 202687487021WYLevel 2No
Apr 2, 202687489305CALevel 2No
Apr 2, 202687484711VALevel 2No
Apr 2, 202687480155CALevel 2No
Apr 2, 202687471554CTLevel 2No
Apr 2, 202687484689FLLevel 2No
Apr 2, 202687477306OKLevel 1No
Apr 2, 202687484628FLLevel 2No
Apr 2, 202687484625OHLevel 2No
Apr 2, 202687476634ALLevel 2No
Apr 2, 202687484248MOLevel 1No
Apr 2, 202687476503USLevel 1No
Apr 2, 202687485432ARLevel 2No
Apr 2, 202687476400UTLevel 1No
Apr 2, 202687476294USLevel 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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