TruckCodex

393.9 — Inoperable Required Lamp

FMCSA violation code under Vehicle Maintenance. 180,097 events recorded in roadside inspections. Severity weight: N/A.

Severity Weight
N/A
OOS Eligible
No
BASIC Category
Vehicle Maintenance
Total Events
180,097
Code
393.9
Code System
FMCSR
BASIC Category
Vehicle Maintenance
OOS Eligible
No
Severity Weight
N/A
Violation Group
—
Total Events
180,097
Carriers Cited
50,029

Violation Description

Inoperable Required Lamp

About This Violation Code

Code 393.9 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 393.9 in the Federal Motor Carrier Safety Regulations.

View on eCFR.gov →FMCSA Violations Search →
Events (all time)
180,097
OOS Events
12,388
OOS Rate
6.9%
Top State (180d)
Texas
49,218 events

Top Enforcing States

Where 393.9 is most commonly cited (last 180 days)

1.Texas
49,218
OOS 7.0%
2.Illinois
1,289
OOS 6.8%
3.Iowa
1,270
OOS 2.2%
4.New Mexico
724
OOS 16.2%
5.Pennsylvania
466
OOS 3.6%
6.North Carolina
445
OOS 12.4%
7.Kentucky
66
OOS 1.5%

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

Citation Trend (12 months)

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

4,010
Apr
9,936
May
9,456
Jun
10,623
Jul
10,231
Aug
9,581
Sep
10,292
Oct
8,634
Nov
9,523
Dec
9,467
Jan
10,911
Feb
10,323
Mar
366
Apr

Most Active Stations

Inspection stations citing 393.9 most often (last 180 days)

1.PHARR POE
2,253
OOS 4.7%
2.VETERANS POE
2,176
OOS 3.4%
3.YSLETA POE
2,046
OOS 14.3%
4.COLUMBIA POE
1,443
OOS 13.4%
5.BOTA POE
1,195
OOS 9.0%
6.US281 SB FALFURRIAS SCALE
1,039
OOS 10.2%
7.INDIOS POE
892
OOS 5.9%
8.US77 RIVIERA SCALE
603
OOS 7.6%
9.IH35 SB DEVINE SCALE
472
OOS 4.2%
10.CAMINO REAL POE
430
OOS 11.9%

Often Cited Together

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

392.2RG4,367 co-occurrences393.783,862 co-occurrences393.9TS3,497 co-occurrences393.45B2UV3,369 co-occurrences396.17C3,113 co-occurrences393.47E3,075 co-occurrences393.112,582 co-occurrences396.3A12,549 co-occurrences396.5B2,484 co-occurrences393.75C2,327 co-occurrences

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

Top Carriers Cited

Ranked by frequency • 50,029 carriers total • Page 1 of 2002

Top Carriers with 393.9 Violations

Showing 25 of 50,029

fmcsa-violations
Top Carriers with 393.9 Violations
#CarrierUSDOT# Violations
#1TRANSPORTE INTERNACIONAL LOPEZ OCHOA SA DE C V1041907544
#2RUBEN CARLOS TREVINO SANCHEZ1649689544
#3SERVICIO INTERNACIONAL DE ENLACE TERRESTRE SA DE CV818175500
#4VRP TRANSPORTES DE MEXICO S DE RL DE CV662058488
#5TRANSPORTES DE CARGA SAUL SALINAS SA DE CV557676415
#6TRANSPORTADORA NORTE DE CHIHUAHUA S A DE C V711125381
#7OPERADORA DE TRANSPORTE INTERNACIONAL SA DE CV683428355
#8TRANSPORTES AGUILA DE CIUDAD JUAREZ SA DE CV555365306
#9JESUS MA VALDEZ GARCIA2534784305
#10SERVICIO DE TRANSPORTE INTERNACIONAL Y LOCAL SA DE CV557341303
#11RS TRANSFER SA DE CV1156825280
#12EVANS DELIVERY COMPANY INC38111273
#13AUTOTRANSPORTES ROMEDU SA DE CV1148259264
#14AUTOTRANSPORTES FRONTERIZOS MG SA DE CV1770534253
#15SERVICIOS DE LOGISTICA TRANSNACIONAL EN TRANSPORTACION SA DE CV2380911239
#16CNC LOGISTICS S DE RL DE CV2726203230
#17TRANSPORTES CRUZADOS SA DE CV1694611227
#18TRANSPORTE INTERNACIONAL JONICK LOPEZ SA DE CV820981217
#19LINEA AMERICA TRANSPORTE S DE RL DE CV3240043217
#20SERGIO VARELA MALDONADO725226199
#214G TRANSFER US-MEX SA DE CV2828651198
#22TRANSPORTES LARMEX SA DE CV2436353198
#23ALMA LUZ SANTOS SALDIVAR1806071192
#24QUALITY TANK SA DE CV2864600191
#25FLETES MEXICO CHIHUAHUA SA DE CV1053118190

Recent Inspections

Latest inspections where 393.9 was cited • 180,097 total events • Page 1 of 7204

Recent Inspections with 393.9

Showing 25 of 180,097

fmcsa-inspections
Recent Inspections with 393.9
DateReport #StateLevelOOS
Apr 2, 202687486567NCLevel 2Yes
Apr 2, 202687486770ILLevel 1No
Apr 2, 202687486790ILLevel 2No
Apr 2, 202687486808ILLevel 2No
Apr 2, 202687486822ILLevel 2No
Apr 2, 202687486827ILLevel 1No
Apr 2, 202687486831ILLevel 2No
Apr 2, 202687487697TXLevel 1No
Apr 2, 202687488016TXLevel 2No
Apr 2, 202687487659TXLevel 2Yes
Apr 2, 202687488106TXLevel 1Yes
Apr 2, 202687487658TXLevel 2No
Apr 2, 202687488378TXLevel 2No
Apr 2, 202687488082TXLevel 2No
Apr 2, 202687488191TXLevel 1No
Apr 2, 202687487091TXLevel 2No
Apr 2, 202687487092TXLevel 2No
Apr 2, 202687488056TXLevel 2No
Apr 2, 202687487920TXLevel 2No
Apr 2, 202687488055TXLevel 2No
Apr 2, 202687488001TXLevel 1Yes
Apr 2, 202687487110TXLevel 1No
Apr 2, 202687487120TXLevel 2No
Apr 2, 202687488392TXLevel 2No
Apr 2, 202687487977TXLevel 2No

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
ToolSearch Carriers
Look up carriers by USDOT, name, or VIN