TruckCodex

393.9B-LSLOWR — Lighting - Stop lamps - Both obscured when required to be on.

FMCSA violation code under Vehicle Maintenance. 742 events recorded in roadside inspections. Severity weight: N/A.

Severity Weight
N/A
OOS Eligible
No
BASIC Category
Vehicle Maintenance
Total Events
742
Code
393.9B-LSLOWR
Code System
FMCSR
BASIC Category
Vehicle Maintenance
OOS Eligible
No
Severity Weight
N/A
Violation Group
—
Total Events
742
Carriers Cited
662

Violation Description

Lighting - Stop lamps - Both obscured when required to be on.

About This Violation Code

Code 393.9B-LSLOWR falls under the Vehicle Maintenance BASIC category in FMCSA's Safety Measurement System (SMS).

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 393.9B in the Federal Motor Carrier Safety Regulations.

View on eCFR.gov →FMCSA Violations Search →
Events (all time)
742
OOS Events
726
OOS Rate
97.8%
Top State (180d)
Missouri
20 events

Top Enforcing States

Where 393.9B-LSLOWR is most commonly cited (last 180 days)

1.Missouri
20
OOS 100.0%
2.California
16
OOS 93.8%
3.Pennsylvania
12
OOS 100.0%
4.Tennessee
11
OOS 100.0%
5.US
10
OOS 100.0%
6.Georgia
9
OOS 100.0%
7.Kansas
8
OOS 100.0%
8.Washington
7
OOS 100.0%
9.Florida
6
OOS 100.0%
10.Utah
5
OOS 100.0%
11.Alabama
5
OOS 100.0%
12.Ohio
5
OOS 100.0%
13.South Carolina
5
OOS 100.0%
14.Maryland
4
OOS 100.0%
15.Minnesota
4
OOS 100.0%

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

Citation Trend (12 months)

Monthly count of 393.9B-LSLOWR citations. Red bars mark months with OOS-triggering citations.

18
Apr
32
May
39
Jun
49
Jul
49
Aug
46
Sep
45
Oct
25
Nov
45
Dec
31
Jan
39
Feb
37
Mar
4
Apr

Most Active Stations

Inspection stations citing 393.9B-LSLOWR most often (last 180 days)

1.LAREDO TX
8
OOS 100.0%
2.PA
7
OOS 100.0%
3.MEMPHIS TN
6
OOS 100.0%
4.WILLIAMSBURG MO
4
OOS 100.0%
5.RAINBOW IF
3
OOS 66.7%
6.STANTON TN
3
OOS 100.0%
7.MAYVIEW MO
2
OOS 100.0%
8.WILSON COUNTY - 205
2
OOS 100.0%
9.ERSKINE MN
2
OOS 100.0%
10.THOMASVILLE GA
2
OOS 100.0%

Often Cited Together

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

393.9B-LTSO61 co-occurrences393.9A-LTSI23 co-occurrences396.17C-PI21 co-occurrences392.2-SLLSR18 co-occurrences395.8E-HOSPD16 co-occurrences393.9B-LRLO13 co-occurrences393.9B-LIL11 co-occurrences393.48A-BIHE9 co-occurrences393.104F3-C9 co-occurrences392.2-SLLED8 co-occurrences

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

Top Carriers Cited

Ranked by frequency • 662 carriers total • Page 1 of 27

Top Carriers with 393.9B-LSLOWR Violations

Showing 25 of 662

fmcsa-violations
Top Carriers with 393.9B-LSLOWR Violations
#CarrierUSDOT# Violations
#1LADA TRANS INC29983818
#2KLU TRANS LLC42630466
#3AUTO HAUL EXPRESS LLC43293255
#4TRANSPORTES DE CARGA FEMA SA DE CV11750185
#5GFT EXPRESS LLC42255624
#6HORIZEN LLC44002343
#7NIMBUS 2000 LLC44365423
#8DORATRANS LLC43556873
#9FASTWAYCOMP LLC44491693
#10ASV XPRESS LLC43893013
#11PINGVIN EXPRESS LLC43352573
#12K44 TRANSPORTATION LLC41671213
#13CORPORACION CLC SOLUTIONS S DE RL DE CV21385153
#14MR CARHAUL LLC42139963
#15PALYCH TRANS LLC43357633
#16K1K TRANS LLC42823913
#17TSM CONNECT SA DE CV21341552
#18TRANSPORTES INTERNACIONALES MAAR SA DE CV11702412
#19SUPLICIUM TRANSPORT LLC43812552
#20ECODRAIN LLC41257362
#21T GARZA TRUCKING AND HARVESTING31520672
#22ALGA FREIGHT COMPANY40710912
#23BLAIR LOGISTICS LLC19410862
#24KD TRANSPORT LLC27259482
#25WOLF INDUSTRIES INC21318642

Recent Inspections

Latest inspections where 393.9B-LSLOWR was cited • 742 total events • Page 1 of 30

Recent Inspections with 393.9B-LSLOWR

Showing 25 of 742

fmcsa-inspections
Recent Inspections with 393.9B-LSLOWR
DateReport #StateLevelOOS
Apr 2, 202687475623VALevel 1Yes
Apr 1, 202687465516OKLevel 1Yes
Apr 1, 202687475579SCLevel 2Yes
Apr 1, 202687476470IDLevel 1Yes
Mar 31, 202687473498AZLevel 2Yes
Mar 31, 202687451261MTLevel 2Yes
Mar 31, 202687465648OKLevel 2Yes
Mar 28, 202687485425NYLevel 2Yes
Mar 25, 202687437095LALevel 1Yes
Mar 24, 202687412325CALevel 1Yes
Mar 23, 202687388757OHLevel 2Yes
Mar 23, 202687369197AKLevel 2Yes
Mar 20, 202687383148INLevel 2Yes
Mar 20, 202687401471MOLevel 1Yes
Mar 20, 202687341641KSLevel 2Yes
Mar 19, 202687402392MTLevel 2Yes
Mar 19, 202687369053ORLevel 1Yes
Mar 16, 202687314056MILevel 2Yes
Mar 15, 202687351934MDLevel 1Yes
Mar 13, 202687338690MNLevel 2Yes
Mar 12, 202687292547GALevel 2Yes
Mar 12, 202687309293INLevel 2Yes
Mar 12, 202687289150OHLevel 1Yes
Mar 11, 202687271843UTLevel 1Yes
Mar 11, 202687260656ALLevel 2Yes

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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