NHTSA ID Number: 11022489
Manufacturer Communication Number: E273
TSB/Document Date: 2025-09-03
Summary
Part number 2300479 Engine Control Module has been added to the parts table for PACCAR
MX-11EMY2021. Part number 2302109 Engine Control Module has been added to the parts table for PACCAR MX-11 andMX-13 EMY2023. Per Environment and Climate Change Canada (ECCC) regulations and guidance (Canadian Environmental Protection Act, 1999 (CEPA)), a letter has been provided to owners of Canadian registered chassis that provides a list of emissions components that have been reported (to ECCC) as having a defect."
E273: Canadian Registered Chassis Only, PACCAR MX-11
and MX-13 Fix-As-Fail Notification
8/22/2025
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E273
Canadian Registered Chassis Only, PACCAR MX-11 and MX-13 Fix-As-Fail Notification
Subject
Canadian Registered Chassis Only, PACCAR MX-11 and MX-13 Fix-As-Fail Notification
Whats New Abstract
Fix-As-Fail
Part number 2300479 Engine Control Module has been added to the parts table for PACCAR MX-11
EMY2021.
Part number 2302109 Engine Control Module has been added to the parts table for PACCAR MX-11 and
MX-13 EMY2023.
Per Environment and Climate Change Canada (ECCC) regulations and guidance (Canadian
Environmental Protection Act, 1999 (CEPA)), a letter has been provided to owners of Canadian
registered chassis that provides a list of emissions components that have been reported (to ECCC) as
having a defect.
Revision
08/22/2025: Part number 2300479 Engine Control Module has been added to the parts table for
PACCAR MX-11 EMY2021. Part number 2302109 Engine Control Module has been added to the parts
table for PACCAR MX-11 and MX-13 EMY2023.
09/19/2024: Added PN 2200138 DPF Pressure sensor for EMY2021 MX-13-1, EMY2022 MX-13,
EMY2020 MX-13-2, and EMY 2021B MX-13-1. Added PN 2236409 NOx Sensor for EMY2020 MX-13-1.
03/13/2024: Part number 2131533 DPF Module for EMY18 MX13-2 (485 hp / 360 kW and above) has
been added to the parts table.
11/01/2023: Part number 2200138 DPF Delta Pressure Sensors for MX-13-2 (485 hp / 360 kW and
above), EMY19 have been added to the parts table. Part Number 1818119 DPF Delta Pressure Sensors
now includes MX-13-2 (485 hp / 360 kW and above), EMY18.
04/06/2023: Added NOx sensor before catalyst (2006246) for EMY2016 MX-13 and EMY2017 MX-13-2
(485hp and above).
Condition
Per Environment and Climate Change Canada (ECCC) regulations and guidance (Canadian
Environmental Protection Act, 1999 (CEPA), a letter has been provided to owners of Canadian registered
chassis that provides a list of emissions components that have been reported (to ECCC) as having a
defect.
Chassis Affected
Canadian registered chassis with PACCAR Engine Model Year 2013-2023 MX-11/MX-13/MX-13-2
engines.
PACCAR MX-11, Engine Model Year 2016-2021
PACCAR MX-13, Engine Model Year 2013-2018, 2023
PACCAR MX-13-2, Engine Model Year 2018
PACCAR MX-13-2, Engine Model Year 2019, 2020
PACCAR MX-13-1, Engine Model Year 2020-2021
Action
Fix-As-Fail
If a customer comes into your dealership and the failed part is on the list in the procedure section, inform
the customer IF the failure is covered by Standard Warranty or any applicable active Extended Warranty.
See Warranty section below.
Warranty
Through Standard Warranty or any applicable active Extended Warranty, Kenworth will pay for parts at
dealer net plus applicable mark-up and labor.
NOTE
The warranty coverage for many of these chassis has expired. PACCAR is not
responsible for providing coverage on chassis with expired warranties.
File a standard long form claim as appropriate to the repair.
This bulletin does not imply any extended warranty coveragebeyond what SIR indicates.
Parts
Parts are available through PPD.
Always use the latest available part number.
Procedure
NOTE
This is NOT a recall or campaign. This is NOT a
proactive replacement of parts. Rather, if the
Malfunction Indicator Lamp (MIL) is ON AND a
Kenworth dealer determines the cause is due to
the defective part, then the dealer can replace the
defective part within the warranty guidelines above.
List of affected parts:
Engine
Part
Model Engine Model
Number
Year
Part
Description
2013,
2014
MX-13
1873793
NOx sensor
after catalyst
2013,
2014,
2016
MX-13
1954664
NOx sensor
after catalyst
2013,
2014,
2015
MX-13
1954665
NOx sensor
after catalyst
2013,
2014,
2015
MX-13
1954666
NOx sensor
after catalyst
2017
2018
MX-11, MX-13 2131542
MX-11
2131542
PM sensor
PM sensor
2016
MX-11, MX-13 2044457
MX-13
2017
2017
1818119
MX-11, MX-13 2131533
PM sensor
DPF
Differential
Pressure
sensor
DPF module
2017,
2018
MX-13
2046616 EGR Flex Pipe
2016
MX-13
2006246
NOx sensor
before catalyst
2017
X-13-2
M
NOx sensor
(485hp/360kW 2006246
before catalyst
and above)
2018
X-13-2
M
(485hp/360kW 1818119
and above)
DPF DP
sensor
2019,
2020
MX-13-2
(485hp/360kW 2200138
and above)
DPF DP
sensor
2018
MX-13-2
(485hp/360kW 2131533
and above)
DPF module
021,
2
2021B
MX-13-1 (455
hp / 340 kW
and below)
2200138
DPF DP
sensor
2022
MX-13
2200138
DPF DP
sensor
2020
MX-13-1 (455
hp / 340 kW
and below)
2236409
Ox Sensor
N
before catalyst
2020
MX-13-2 (485
hp / 360 kW
and above)
2200138
DPF DP
sensor
MX-11
2021
2023
PF DP
D
sensorEngine
2300479
Control
Module
MX-11, MX-13 2302109
Attachments
Customer Letter - English & French
Authored by: JK
Engine Control
Module
Kenworth Truck Company
Customer Service Department
PO Box 1000
Kirkland, Washington 98083-1000
(425) 828-5888
Date of Letter
Subject: E273: Canadian Registered Chassis Only, PACCAR MX-11 and MX-13 Fix-As-Fail Notification
EXPIRATION DATE: NONE
The VINs are listed on the back of this page.
Customer name
Customer address
City, State ZIP
Dear Kenworth Customer,
You are receiving this notice in accordance with the Canadian Environmental Protection Act of 1999.
Kenworth has decided that certain PACCAR MX-11 and MX-13 engine model years manufactured from 2013
through 2023 fail to conform to emission control requirements. Your vehicle has been identified as possibly
having one or more of the suspect parts, listed in Table 1 below.
This is not a recall, campaign or a proactive replacement of parts. If you experience the Malfunction Indicator
Lamp (MIL) turning on and a Kenworth dealer determines the cause is due to a defective part listed in Table
1, then your Kenworth dealer can replace the defective part through any applicable active Base or Extended
Warranties.
Table 1 - Description of Failure
Engine Model
Year
Engine Model
Part Number
2013, 2014
MX-13
(1)1873793
NOx sensor
after catalyst
The oxides of nitrogen (NOx) sensor failure will trigger
Malfunction Indicator Lamp MIL) and torque derate. Prompt
repair of NOX sensor will limit the potential emission impact.
2013, 2014, 2016
MX-13
(1)1954664
NOx sensor
after catalyst
The oxides of nitrogen (NOx) sensor failure will trigger
Malfunction Indicator Lamp MIL) and torque derate. Prompt
repair of NOX sensor will limit the potential emission impact.
2013, 2014, 2015
MX-13
(1)1954665
NOx sensor
after catalyst
The oxides of nitrogen (NOx) sensor failure will trigger
Malfunction Indicator Lamp MIL) and torque derate. Prompt
repair of NOX sensor will limit the potential emission impact.
2013, 2014, 2015
MX-13
(1)1954666
NOx sensor
after catalyst
The oxides of nitrogen (NOx) sensor failure will trigger
Malfunction Indicator lamp MIL) and torque derate. Prompt
repair of NOX sensor will limit the potential emission impact.
MX-13, MX-11
(1)2044457
PM sensor
The Particulate Matter (PM) sensor may malfunction and
eventually illuminate the Malfunction Indicator Lamp (MIL).
There is no direct emission impact from sensor failure as the
sensor is not part of the emission control strategy.
MX-13, MX-11
(1)2131542
PM sensor
The Particulate Matter (PM) sensor may malfunction and
eventually illuminate the Malfunction Indicator Lamp (MIL).
There is no direct emission impact from sensor failure as the
sensor is not part of the emission control strategy.
MX-11
(1)2131542
PM sensor
The Particulate Matter (PM) sensor may malfunction and
eventually illuminate the Malfunction Indicator Lamp (MIL).
There is no direct emission impact from sensor failure as the
sensor is not part of the emission control strategy.
2016
2017
2018
Part
Description
Result of Failure
Kenworth Truck Company
Customer Service Department
PO Box 1000
Kirkland, Washington 98083-1000
(425) 828-5888
2017
2017
2017, 2018
(1)2131533
A cracked DPF may allow exhaust gas with high level of
particulate matter to exit the tailpipe. The failure will also trigger
DPF Module
a diagnostic fault and illuminate the MIL to alert the driver that
prompt service is required to limit potential emission impact.
MX-13
(1)1818119
The Diesel Particulate Filter (DPF) pressure sensor malfunction
will trigger a diagnostic fault and illuminate the Malfunction
Indicator Lamp (MIL). This may lead to engine torque derate.
Prompt repair of the DPF pressure sensor will limit the potential
emission impact.
MX-13
(1)2046616
MX-13, MX-11
2016
MX-13
2017
MX-13-2 (485
hp / 360 kW
and above)
2018
MX-13-2 (485
hp / 360 kW
and above)
2019
MX-13-2 (485
hp / 360 kW
and above)
2018
MX-13-2 (485
hp / 360 kW
and above)
2020
MX-13-2 (485
hp / 360 kW
and above)
2021, 2021B
MX-13-1 (455
hp / 340 kW
and below)
2022
MX-13
2020
MX-13-1 (455
hp / 340 kW
and below)
DPF DP
sensor
An EGR Flex pipe leak allows a part of untreated exhaust to
vent to the atmosphere. The emission control system will
EGR flex pipe
continue to perform normally, and emission does not exceed the
prescribed standard.
(1)2006246
NOx Sensor
before
catalyst
The failure of the NOx Sensor before catalyst has minimal
impact on emissions over the useful life of the vehicle. The
oxides of nitrogen (NOX) sensor failure will trigger Malfunction
Indicator Lamp (MIL) and torque derate. Prompt repair of NOx
sensor will limit potential emission impact.
(1)2006246
NOx Sensor
before
catalyst
The failure of the NOx Sensor before catalyst has minimal
impact on emissions over the useful life of the vehicle. The
oxides of nitrogen (NOX) sensor failure will trigger Malfunction
Indicator Lamp (MIL) and torque derate. Prompt repair of NOx
sensor will limit potential emission impact.
DPF DP
sensor
The Diesel Particulate Filter (DPF) pressure sensor malfunction
will trigger a diagnostic fault and illuminate the Malfunction
Indicator Lamp (MIL). This may lead to engine torque derate.
Prompt repair of the DPF pressure sensor will limit the potential
emission impact.
DPF DP
sensor
The Diesel Particulate Filter (DPF) pressure sensor malfunction
will trigger a diagnostic fault and illuminate the Malfunction
Indicator Lamp (MIL). This may lead to engine torque derate.
Prompt repair of the DPF pressure sensor will limit the potential
emission impact.
(1)1818119
(1)2200138
(1)2131533
A cracked DPF may allow exhaust gas with high level of
particulate matter to exit the tailpipe. The failure will also trigger
DPF Module
a diagnostic fault and illuminate the MIL to alert the driver that
prompt service is required to limit potential emission impact .
(1)2200138
DPF DP
sensor
The Diesel Particulate Filter (DPF) pressure sensor malfunction
will trigger a diagnostic fault and illuminate the Malfunction
Indicator Lamp (MIL). This may lead to engine torque derate.
Prompt repair of the DPF pressure sensor will limit the potential
emission impact.
(1)2200138
DPF DP
sensor
The Diesel Particulate Filter (DPF) pressure sensor malfunction
will trigger a diagnostic fault and illuminate the Malfunction
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TSB/Document ID: E273
Replacement Service Bulletin Number:
MFR Communication Date: 2025-08-22
MFR Internal Campaign ID/Software Version: E273
Communication Type: Emissions
NHTSA Components: FUEL/PROPULSION SYSTEM
MFR Component System:
MFR Component Subsystem:
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