NHTSA ID Number: 10173142
Manufacturer Communication Number: U13_P008A00
TSB/Document Date: 2020-04-02
Summary
Low Pressure Fuel System Pressure - Too Low
P008A-00
DTC:
GDC18-059
Bulletin:
February 20, 2020
Date:
Low Pressure Fuel System Pressure - Too Low –
No additional information
Description:
US13 - US17 Emissions
Applies to:
For Spanish click here: ESPAÑOL
General Information
These repair instructions are intended to address the following fault(s):
DTC
P008A 00
Description
Low Pressure
Fuel System
Pressure - Too
Low
Possible (Observable)
Symptoms
Possible Cause
x
x
x
x
x
x
Fuel filter
Fuel system
Overflow valve
Fuel pump
Engine Fuel Pressure Sensor
Air in the fuel system
x
x
Difficult starting
Low Power
Required Parts
Part Number
Description
Quantity
21634021
Fuel Pressure Sensor
1
968559
1
Repair Instructions
Fuel Pressure Sensor, Replacement
*Note: Please check that the fuel filter is not clogged and/or has been replaced through the maintenance schedule
before proceeding to replace the Oil Pressure Sensor.
Removal
1. Park the vehicle on a flat level surface, apply the parking brake, and place the shift lever in neutral (manual
transmission) or Park (automatic transmission). Turn the ignition key to the OFF position.
2. Position wheel chocks at the vehicle rear wheels to prevent the vehicle from rolling.
3. Operate the hood release and raise the hood of the vehicle.
4. Disconnect all cables from the negative (ground) battery terminals to prevent personal injury from electrical
shock and prevent damage to electrical components.
© 2016 Mack Trucks
, Inc. Information is subject to change without notice.
Page 1/3
DTC:
P008A-00
Bulletin:
Date:
GDC18-059
February 20, 2020
5. Disconnect the wiring harness lead from the fuel pressure sensor connector.
6. Remove the defective sensor from the top of the fuel filter housing. Remove and discard the old O-ring.
Installation
1. Place a new O-ring on the fuel pressure sensor port on top of the fuel filter housing. Screw in the replacement
fuel pressure sensor by hand until finger tight, then, tighten the sensor hexagon nut to specification. Refer to
Function Group 20, Specifications.
© 2016 Mack Trucks, Inc. Information is subject to change without notice.
Page 2/3
DTC:
P008A-00
Bulletin:
Date:
GDC18-059
February 20, 2020
2. Connect the electrical harness lead to the connector on the replacement fuel pressure sensor.
3. Reconnect all previously removed cables to the negative (ground) battery terminals.
4. Start the vehicle and check for proper operation; use the Tech Tool to check and clear any diagnostic trouble
codes (DTC).
5. Close and latch the vehicle hood.
6. Remove the chocks from the rear wheels.
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. If filing a warranty claim, please include the ASIST case number.
Labor Code
2339-03-02-05
0.4
Causal Part
21634021
© 2016 Mack Trucks, Inc. Information is subject to change without notice.
Page 3/3
DTC:
P008A-00
Boletín:
Fecha:
GDC18-032
20 de febrero de 2020
Presión del sistema de combustible a baja presión:
demasiado baja
Descripción:
Emisiones de US13 - US17
Se aplica a:
Para inglés, haga clic aquí: ENGLISH
Información general
Estas instrucciones de reparación están destinadas a abordar las siguientes fallas:
DTC
P008A - 00
Descripción
Presión del sistema
de combustible a baja
presión: demasiado
baja
Posibles síntomas
(observados)
Causa posible
x
x
x
x
x
x
Filtro de combustible
Sistema de combustible
Valvula sobrecargada
Bomba de combustible
Sensor de presión de combustible del
motor
Aire en el sistema de combustible.
x
x
Inicio difícil
Baja potencia
Piezas necesarias
Número de pieza
Descripción
Cantidad
21634021
Sensor de presión de combustible
1
968559
Junta tórica
1
Instrucciones de reparación
Sensor de presión de combustible, reemplazo
Nota: Compruebe que el filtro de combustible no esté obstruido y / o haya sido reemplazado a través del programa
de mantenimiento antes de proceder a reemplazar el sensor de presión de aceite.
Desinstalación
1. Estacione el vehículo en una superficie plana, aplique el freno de estacionamiento y coloque la palanca de
cambios en punto muerto (transmisión manual) o Estacionar (transmisión automática). Gire la llave de
contacto a la posición OFF.
2. Coloque calzos en las ruedas traseras del vehículo para evitar que el vehículo ruede.
3. Accione la apertura del capó y levante el capó del vehículo.
4. Desconecte todos los cables de los terminales negativos (tierra) de la batería para evitar lesiones personales
por descargas eléctricas y daños a los componentes eléctricos.
© 2016 Mack Trucks, Inc. La información está sujeta a cambios sin aviso previo.
Página 1/3
DTC:
P008A-00
Boletín:
Fecha:
GDC18-032
20 de febrero de 2020
5. Desconecte el cable del mazo de cables del conector del sensor de presión de combustible.
6. Retire el sensor defectuoso de la parte superior de la carcasa del filtro de combustible. Retire y deseche la
junta tórica vieja.
Instalación
1. Coloque una nueva junta tórica en el puerto del sensor de presión de combustible en la parte superior de la
carcasa del filtro de combustible. Atornille el sensor de presión de combustible de repuesto con la mano
hasta que quede apretado con los dedos, luego, apriete la tuerca hexagonal del sensor según las
especificaciones. Consulte el Grupo de funciones 20, Especificaciones.
© 2016 Mack Trucks, Inc. La información está sujeta a cambios sin aviso previo.
Página 2/3
DTC:
P008A-00
Boletín:
Fecha:
GDC18-032
20 de febrero de 2020
2. Conecte el cable del arnés eléctrico al conector del sensor de presión de combustible de repuesto.
3. Vuelva a conectar todos los cables retirados previamente a los terminales negativos (tierra) de la batería.
4. Arranque el vehículo y verifique que funcione correctamente; use la herramienta técnica para verificar y
borrar los códigos de diagnóstico de problemas (DTC).
5. Cierre y trabe el capó del vehículo.
6. Retire los calzos de las ruedas traseras.
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. Si presenta una reclamación de garantía,
incluya el número de caso ASIST.
Código de trabajo
2339-03-02-05
0.4
Pieza causal
21634021
© 2016 Mack Trucks, Inc. La información está sujeta a cambios sin aviso previo.
Página 3/3
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TSB/Document ID: U13_P008A00
Replacement Service Bulletin Number:
MFR Communication Date: 2020-03-10
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE
MFR Component System:
MFR Component Subsystem:
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