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NHTSA ID Number: 10173493

Manufacturer Communication Number: P204A13

TSB/Document Date: 2020-04-07


Summary

Reductant Pressure Sensor - Circuit Open


VOLVO TRUCKSeBay logo

REMOTE DIAGNOSTICS - REPAIR INSTRUCTIONS
DTC:

Description:
Applies to:

Bulletin:
Date:

P204A-13

RD17-017
June 25, 2018

Reductant Pressure Sensor - Circuit Open
US13 – US Emissions

For Spanish click here: ESPAÑOL
General Information
These repair instructions are intended to address the following fault(s):
DTC

Description

P204A-13

Reductant
Pressure Sensor
- Circuit Open

Possible (Observable)
Symptoms

Possible Cause
x
x
x
x

Open circuit, Signal wire
Open circuit, Ground wire
Wiring harness
Aftertreatment Diesel Exhaust Fluid (DEF) Pump

No aftertreatment diesel
exhaust fluid (DEF)
dosage

Required Parts
Part Number

Description

Quantity

21577507

Diesel Exhaust Fluid (DEF) Pump Unit

1

Repair Instructions
Aftertreatment Diesel Exhaust Fluid (DEF) Pump Unit, Replacement
Before replacing the DEF Pump Unit please check for damaged return hoses and connectors.
1. Disconnect and clean the aftertreatment DEF lines between the DEF tank and the DEF pump using water and
compressed air. If the line is broken then it will have to be replaced.

Page 1 of 4
© 2016 VolvoeBay logo Group North America, LLC. Information is subject to change without notice.

VOLVO TRUCKSeBay logo

REMOTE DIAGNOSTICS - REPAIR INSTRUCTIONS
DTC:

P204A-13

Bulletin:
Date:

RD17-017
June 25, 2018

Removal
1. Apply parking brake and place shift lever in neutral.
2. Remove all cables from ground (negative) battery terminals to prevent personal injury from electrical shock and
prevent damage to electrical components.
3. If equipped, remove the side fairing covering the Diesel Exhaust Fluid (DEF) tank.
4. Connect the coolant extractor to the drain fitting at the bottom of the radiator and drain the coolant. Special
tools: DBT2V700, 9996049. Note: An alternate method is to connect the coolant drain hose to the drain fitting
and drain the coolant into a suitable container.
5. Mark the DEF lines before removal. Place a suitable container under the DEF tank to catch fluid that may drain
from the pump. Remove the DEF inlet, backflow and outlet lines from the pump.
Note: For information on the handling of DEF, refer to “General Safety Practices”, Group 20.
Note: If inlet and backflow lines are switched, the system will not start.

1. DEF Inlet Line
2. DEF Backflow Line
3. DEF Outlet Line

Page 2 of 4
© 2016 VolvoeBay logo Group North America, LLC. Information is subject to change without notice.

VOLVO TRUCKSeBay logo

REMOTE DIAGNOSTICS - REPAIR INSTRUCTIONS
DTC:

P204A-13

Bulletin:
Date:

RD17-017
June 25, 2018

6. Remove the inlet and outlet coolant lines from the pump. Place protective caps on the DEF and coolant
connectors.

1. Inlet Coolant Lines
2. Outlet Coolant Lines
7. Remove cable tie and disconnect the wiring harness from the DEF pump. Cover the electrical connector with a
plastic bag to protect from possible damage from the DEF.

1. Cable Tie
2. Wiring Harness

Page 3 of 4
© 2016 VolvoeBay logo Group North America, LLC. Information is subject to change without notice.

VOLVO TRUCKSeBay logo

REMOTE DIAGNOSTICS - REPAIR INSTRUCTIONS
DTC:

Bulletin:
Date:

P204A-13

RD17-017
June 25, 2018

8. Remove the DEF pump from the tank by removing the fasteners along with the bracket.

1.Fasteners
2.Bracket
3.DEF Pump

Installation
1. Install fasteners to attach bracket and the DEF pump onto the tank. Tighten the fasteners to specification. Refer
to Specifications in Group 20.
2. Remove plastic bag from the electrical connector. Connect the wiring harness to the DEF pump and secure the
harness using a cable tie.
3. Install the inlet and outlet coolant lines onto the DEF pump.
4. Install DEF inlet, backflow and outlet lines onto the pump. Note: If inlet and backflow lines are switched, the
system will not start.
5. If equipped, install the side fairing that covers the DEF tank.
6. Install all previously removed cables to the ground (negative) battery terminals.
7. Fill the cooling system with the recommended coolant using the coolant extractor. Ensure the coolant system is
full. Special tools: DBT2V700
8. Use the diagnostic tool to purge the air out of the coolant heating system.
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
2581-03-02-01

1.0

Causal Part

21577507

Page 4 of 4
© 2016 VolvoeBay logo Group North America, LLC. Information is subject to change without notice.

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INSTRUCCIONES DE REPARACIÓN DE DIAGNÓSTICO REMOTO
DTC:
Descripción:

Se aplica a:

P204A-13

Boletín:
Fecha:

RD17-026
16 de agosto de 2018

Retorno del reductor: No se detecta flujo - Funcionamiento de
componente o sistema obstruido o bloqueado
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

P204A-13

Sensor de
presión reductora
- circuito abierto

Posibles síntomas
(observados)

Causa posible
x
x
x
x

Circuito abierto, cable de señal
Circuito abierto, cable a tierra
Arnés de cableado
Bomba de fluido de escape diesel (DEF) de
postratamiento

Sin postratamiento de
dosificación de fluido de
escape diesel (DEF)

Piezas necesarias
Número de pieza

Descripción

Cantidad

21577507

Unidad de bomba de fluido de escape
diésel (DEF)

1

Instrucciones de reparación
Unidad de bomba de fluido de escape diésel de postratamiento (DEF), Reemplazo

Antes de reemplazar la unidad de bomba de DEF, revise mangueras de retorno y conectores dañados.
1. Desconecte y limpie las líneas de DEF de postratamiento entre el tanque de DEF y la bomba de DEF, usando
agua y aire comprimido. Si la línea está rota, tendrá que ser reemplazada.

© 2016 VolvoeBay logo Group North America, LLC. Información sujeta a cambios sin previo aviso.

VOLVO TRUCKSeBay logo

INSTRUCCIONES DE REPARACIÓN DE DIAGNÓSTICO REMOTO
DTC:

P204A-13

Boletín:
Fecha:

RD17-026
16 de agosto de 2018

'HVLQVWDODFLyQ
1. Aplique el freno de estacionamiento y coloque la palanca de cambios en punto muerto.
2. Retire todos los cables de los terminales negativos (tierra) de la batería para evitar lesiones por descargas
eléctricas y daños en los componentes eléctricos.
3. Si está equipado, retire el compensador lateral que cubre el tanque de fluido de escape diésel (DEF).

4. Conecte el extractor de refrigerante a la conexión de drenaje en la parte inferior del radiador y drene el
refrigerante. Herramientas especiales: DBT2V700, 9996049. Nota: Un método alternativo es conectar
una manguera de drenaje del refrigerante a la boquilla de drenaje y drenar el refrigerante en un
contenedor adecuado.
5. Marque las líneas de DEF antes de retirarlas. Ubique un contenedor adecuado bajo el tanque de DEF para
capturar el fluido que pueda drenarse desde el tanque. Retire las líneas de entrada, flujo trasero y salida de
DEF desde la bomba.
Nota: Para obtener información sobre la manipulación de DEF, consulte “Prácticas de seguridad generales”, Grupo 20.
Nota: Si las líneas de entrada y flujo trasero están cambiadas, el sistema no encenderá.

1. Línea de entrada de DEF
2. Línea de flujo trasero de DEF
3. Línea de salida de DEF

© 2016 VolvoeBay logo Group North America, LLC. Información sujeta a cambios sin previo aviso.

VOLVO TRUCKSeBay logo

INSTRUCCIONES DE REPARACIÓN DE DIAGNÓSTICO REMOTO
DTC:

P204A-13

Boletín:
Fecha:

RD17-026
16 de agosto de 2018

6. Retire las líneas de entrada y salida de refrigerante desde la bomba. Ponga tapas protectoras en los
conectores de DEF y refrigerante.

1. Líneas de entrada de refrigerante
2. Líneas de salida de refrigerante

7. Retire las correas y desconecte el arnés de cableado de la bomba de DEF. Cubra el conector eléctrico con una
bolsa plástica para protegerlo de daños posibles por DEF.

1. Correas
2. Arnés de cableado

© 2016 VolvoeBay logo Group North America, LLC. Información sujeta a cambios sin previo aviso.

VOLVO TRUCKSeBay logo

INSTRUCCIONES DE REPARACIÓN DE DIAGNÓSTICO REMOTO
DTC:

P204A-13

Boletín:
Fecha:

RD17-026
16 de agosto de 2018

8. Retire la bomba de DEF desde el tanque al sacar los sujetadores junto con el soporte.

7RUQLOORV
6RSRUWH
Bomba de DEF

Instalación
1. Instale sujetadores para conectar el soporte y la bomba de DEF con el tanque. Ajuste los sujetadores de
acuerdo a las especificaciones. Consulte las Especificaciones en el Grupo 20.
2. Retire la bolsa de plástico desde el conector eléctrico. Conecte el arnés de cableado a la bomba de DEF
y asegure el arnés con una correa.
3. Instale las líneas de entrada y salida de refrigerante en la bomba de DEF.
4. Instale las líneas de entrada, flujo trasero y salida de DEF en la bomba. Nota: Si las líneas de entrada y flujo
trasero están cambiadas, el sistema no encenderá.
5. Si está equipado, instale el compensador lateral que cubre el tanque de DEF.
6. Instale todos los cables que había quitado anteriormente a los terminales negativos (tierra) de la batería.
7. Llene el sistema de refrigeración con el refrigerante recomendado mediante un extractor de refrigerante.
Asegúrese de que el sistema de refrigerante esté lleno. Herramientas especiales: DBT2V700
8. Utilice la herramienta de diagnóstico para purgar el aire del sistema de calefacción de refrigerante.
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
2581-03-02-01

1.0

Pieza causal

21577507

© 2016 VolvoeBay logo Group North America, LLC. Información sujeta a cambios sin previo aviso.

1

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TSB/Document ID: P204A13

Replacement Service Bulletin Number:

MFR Communication Date: 2020-03-09

MFR Internal Campaign ID/Software Version:

Communication Type: Service Bulletin/Repair Instructions

NHTSA Components: ENGINE AND ENGINE COOLING:ENGINE:DIESEL

MFR Component System:

MFR Component Subsystem:


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