TruckCodex

393.43A-TPV — Brake - relay emergency valve

FMCSA violation code under Vehicle Maintenance. 3,845 events recorded in roadside inspections. Severity weight: 7.

Severity Weight
7
OOS Eligible
No
BASIC Category
Vehicle Maintenance
Total Events
3,845
Code
393.43A-TPV
Code System
FMCSR
BASIC Category
Vehicle Maintenance
OOS Eligible
No
Severity Weight
7
Violation Group
—
Total Events
3,845
Carriers Cited
3,201

Violation Description

Relay or emergency valve on CMV is defective or malfunctioning.

About This Violation Code

Code 393.43A-TPV falls under the Vehicle Maintenance BASIC category in FMCSA's Safety Measurement System (SMS). It carries a severity weight of 7 (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 393.43A in the Federal Motor Carrier Safety Regulations.

View on eCFR.gov →FMCSA Violations Search →
Events (all time)
3,845
OOS Events
3,399
OOS Rate
88.4%
Top State (180d)
California
144 events

Top Enforcing States

Where 393.43A-TPV is most commonly cited (last 180 days)

1.California
144
OOS 27.1%
2.US
138
OOS 100.0%
3.Arizona
61
OOS 100.0%
4.Arkansas
59
OOS 100.0%
5.Utah
56
OOS 100.0%
6.Colorado
47
OOS 100.0%
7.Kentucky
47
OOS 100.0%
8.Michigan
40
OOS 100.0%
9.Minnesota
36
OOS 100.0%
10.Missouri
35
OOS 100.0%
11.Washington
34
OOS 100.0%
12.Georgia
28
OOS 100.0%
13.South Carolina
23
OOS 100.0%
14.Indiana
21
OOS 100.0%
15.Pennsylvania
20
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 393.43A-TPV citations. Red bars mark months with OOS-triggering citations.

101
Apr
183
May
188
Jun
184
Jul
220
Aug
202
Sep
246
Oct
213
Nov
195
Dec
178
Jan
177
Feb
184
Mar
8
Apr

Most Active Stations

Inspection stations citing 393.43A-TPV most often (last 180 days)

1.OTAY MESA IF
100
OOS 1.0%
2.PHARR TX
45
OOS 100.0%
3.WEST MEMPHIS AR
27
OOS 100.0%
4.KUTTAWA
23
OOS 100.0%
5.BROWNSVILLE TX
18
OOS 100.0%
6.LAREDO TX
16
OOS 100.0%
7.WEST LAKELAND MN
13
OOS 100.0%
8.HOPE AR
13
OOS 100.0%
9.EL PASO TX
11
OOS 100.0%
10.JOPLIN MO
11
OOS 100.0%

Often Cited Together

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

393.47E194 co-occurrences393.53B-B102 co-occurrences393.45D-B89 co-occurrences393.55E-B83 co-occurrences396.3A1-BOS79 co-occurrences393.45B2-B-AIR78 co-occurrences396.17C-PI76 co-occurrences393.75A3-TAOL75 co-occurrences396.5B-L72 co-occurrences396.3A1-BALAC56 co-occurrences

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

Top Carriers Cited

Ranked by frequency • 3,201 carriers total • Page 1 of 129

Top Carriers with 393.43A-TPV Violations

Showing 25 of 3,201

fmcsa-violations
Top Carriers with 393.43A-TPV Violations
#CarrierUSDOT# Violations
#1JESUS MA VALDEZ GARCIA253478416
#2EVANS DELIVERY COMPANY INC3811114
#3SERVICIO DE TRANSPORTE INTERNACIONAL Y LOCAL SA DE CV55734111
#4SERVICIO INTERNACIONAL DE ENLACE TERRESTRE SA DE CV81817511
#5VRP TRANSPORTES DE MEXICO S DE RL DE CV6620588
#6HECTOR FRANCO ADRIANA PEREZ7606798
#7TRANSPORTES CANALES S A DE C V5588998
#8AUTOTRANSPORTES VARELA DAVILA SA DE CV17168247
#9JFG INTERNATIONAL INC20111617
#10UJU INC16709317
#11TRACTOREMOLQUES AMSA SA DE CV12033737
#12RGX TRANSPORTE DE CARGA INTERNACIONAL SA DE CV12076787
#13FEDERAL EXPRESS CORPORATION868766
#14FLETES Y ACARREOS DE REYNOSA SA DE CV8515746
#15AUTOTRANSPORTES ROMEDU SA DE CV11482596
#16AUTOFLETES GOMEZ LEAL SA DE CV20853086
#17CROWN XPRESS TRANSPORT INC10990856
#18RS TRANSFER SA DE CV11568256
#19MERCER TRANSPORTATION CO INC1547126
#20IRASEMA MARTINEZ CEPEDA6328326
#21LUIS HUMBERTO RODRIGUEZ ESTRADA25804696
#22FLETES MEXICO CHIHUAHUA SA DE CV10531185
#23OPERADORA DE TRANSPORTE INTERNACIONAL SA DE CV6834285
#24TRANSPORTES DE CARGA SAUL SALINAS SA DE CV5576765
#25PEDRO ESPINO DIAZ29378365

Recent Inspections

Latest inspections where 393.43A-TPV was cited • 3,845 total events • Page 1 of 154

Recent Inspections with 393.43A-TPV

Showing 25 of 3,845

fmcsa-inspections
Recent Inspections with 393.43A-TPV
DateReport #StateLevelOOS
Apr 2, 202687476979KYLevel 1Yes
Apr 2, 202687486851MILevel 1Yes
Apr 2, 202687485490USLevel 1Yes
Apr 1, 202687465503OKLevel 1Yes
Apr 1, 202687459146USLevel 1Yes
Apr 1, 202687478134MILevel 1Yes
Apr 1, 202687477964MILevel 1Yes
Apr 1, 202687482716PALevel 1Yes
Mar 31, 202687451163USLevel 1Yes
Mar 31, 202687474114COLevel 1Yes
Mar 31, 202687483138UTLevel 1Yes
Mar 31, 202687457383MOLevel 1Yes
Mar 31, 202687451184VALevel 1Yes
Mar 31, 202687454589USLevel 1Yes
Mar 31, 202687475817IDLevel 1Yes
Mar 30, 202687454709PALevel 2Yes
Mar 30, 202687447162USLevel 1Yes
Mar 30, 202687457371MOLevel 1Yes
Mar 30, 202687454732AZLevel 1Yes
Mar 29, 202687437612ARLevel 2Yes
Mar 28, 202687489243CALevel 1No
Mar 27, 202687421432MILevel 1Yes
Mar 27, 202687475414VALevel 1Yes
Mar 27, 202687421465MILevel 1Yes
Mar 27, 202687443629CALevel 1Yes

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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