NHTSA ID Number: 10173161
Manufacturer Communication Number: U029E00
TSB/Document Date: 2020-04-02
Summary
Lost Communication With NOx Sensor "B"
DTC:
Description:
Applies to:
U029E-00
Bulletin:
GDC18-058
Date:
July 9, 2018
Lost Communication With NOx Sensor "B"
US13 - USEmissions
For Spanish click here: ESPAÑOL
General Information
These repair instructions are intended to address the following fault(s):
DTC
U029E-00
Description
Possible Cause
Lost
Communication
With NOx Sensor
"B"
x
x
x
x
x
x
x
Blown fuse
Supply wire, 12V
Open circuit on ground wire
J1939 CAN2 datalink fault
Faulty or missing terminating resistor in the DPF
wiring harness
Faulty termination resistance in the ECM (EMS)
NOx sensor
Possible (Observable)
Symptoms
Possible engine de-rate
Required Parts
Part Number
Description
Quantity
N/A
N/A
N/A
Repair Instructions
1.
2.
3.
4.
5.
Visually check that wiring harness is not damaged
Check that the connectors are properly connected and locked into position
Disconnect and check the component connector
Inspect pins and terminals for oxidation or corrosion
Ensure that the pins and terminals are locked into the connectors and that they are not pushed back out of
the sockets
6. Check that the pins and terminal are not damaged (which can cause poor connection)
Additional Resources
These repairs are the most likely fix for the identified fault, if this does not fix the issue, Tech Tool will need to be
used for more detailed diagnostics. See Guided Diagnostics fault tracing for U029E-00. If filing a warranty claim,
please include the ASIST case number.
© 2016 Mack Trucks
, Inc. Information is subject to change without notice.
Page 1/1
DTC:
U029E-00
Boletín:
Fecha:
Descripción:
Se aplica a:
GDC18-032
20 de febrero de 2020
Comunicación perdida con sensor “B” de NOx
Emisiones de US13 - US
Para inglés, haga clic aquí: ENGLISH
Información general
Estas instrucciones de reparación están destinadas a abordar las siguientes fallas:
DTC
Descripción
x
x
x
U029E-00
Comunicación perdida
con sensor “B” de NOx
x
x
x
x
Causa posible
Posibles síntomas
(observados)
Fusible quemado
Cable de suministro, 12V
Circuito abierto en cable de conexión
a tierra
J1939 CAN2 falla de enlace de datos
Resistor de terminación faltante o con
fallas en arnés de cableado DPF
Resistencia de terminación con fallas
en ECM (EMS)
Sensor NOx
Posible reducción de
potencia del motor
Piezas necesarias
Número de pieza
Descripción
Cantidad
N/A
N/A
N/A
Instrucciones de reparación
1.
2.
3.
4.
5.
Revise visualmente que el arnés de cableado no esté dañado
Verifique que los conectores están correctamente conectados y asegurados en su posición
Desconecte y revise el conector del componente
Inspeccione los pasadores y terminales por si hay oxidación o corrosión
Asegúrese de que los pasadores y terminales estén asegurados en los conectores y que no son
empujados hacia afuera de los contactos
6. Verifique que los pasadores y terminales no están dañados (lo que puede provocar una conexión deficiente.
Recursos adicionales
Es muy probable que estas reparaciones solucionen la falla identificada; si esto no soluciona el problema, se
requerirá el uso de Tech Tool para diagnósticos más detallados. Vea Rastreo de fallas en Diagnóstico guiado
para U029E-00.
© 2016 Mack Trucks, Inc. La información está sujeta a cambios sin aviso previo.
Página 1/1
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TSB/Document ID: U029E00
Replacement Service Bulletin Number:
MFR Communication Date: 2020-03-10
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: EQUIPMENT
MFR Component System:
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