NHTSA ID Number: 11034396
Manufacturer Communication Number: P003
TSB/Document Date: 2026-07-02
Summary
Leveraging PACCAR
’s advanced Prognostic prediction algorithms, certain PACCAR MX-11 and MX-13 EMY 2024-2026 engines will receive proactive replacement instructions for the NOx sensor after catalyst to maximize uptime and maintain optimal performance.
6/30/26, 9:01 AM
Powertrain Service Bulletin
P003: PACCAR MX Prognostic Replacement: NOx Sensor
After Catalyst
Number
Edit
Clone
P003
Subject
PACCAR MX Prognostic Replacement: NOx Sensor After Catalyst
Date
6/30/2026
Revision
06/30/2026: Bulletin has been published to the Powertrain Service Bulletins section of PACCAR.net.
Condition
Leveraging PACCAR’s advanced Prognostic prediction algorithms, certain PACCAR MX-11 and MX-13
EMY 2024-2026 engines will receive proactive replacement instructions for the NOx sensor after catalyst
to maximize uptime and maintain optimal performance.
P003 must be flagged and open in SIR at the time of the Repair Order (RO) open date to qualify.
Only trucks with an active standard or applicable extended warranty will be included in this campaign.
Trucks flagged in SIR whose warranty expires will be removed. If a repair is performed on a chassis
flagged in SIR after warranty expiration, PACCAR will consider payment on a case-by-case basis.
Chassis Affected
Certain chassis equipped with PACCAR MX-11 and MX-13 EMY 2024-2026 engines will be identified
through the Prognostic Program in SIR as described above
Action
Prognostic Campaign
Service all chassis affected that enter your dealership, even if the customer has no issue with the
chassis.
1. Review the attached chassis list for your dealer code and schedule your customer(s) for service if
their chassis is on the list.
2. In Service Management, select campaign P003 to add it to the case. If the unit is released back
into service without performing the repair, make sure to also release the campaign in Service
1/4
6/30/26, 9:01 AM
Powertrain Service Bulletin
Management.
3. If you are not using Service Management to start repair orders, review SIR for Complete next to the
P003 campaign code prior to performing this repair.
4. Follow the procedures in the Links section to remove and replace the NOx sensor after catalyst.
Warranty
Starting on 10/27/2025 Kenworth will pay for parts at dealer net plus applicable mark-up and labor.
PACCAR will identify and load chassis to PRWS and SIR.
P003 must be flagged and open in SIR at the time of the RO open date to qualify.
1.9 hours to R&R the NOx sensor after catalyst and perform the repair verification per the bulletin
procedure. Select Recommended Repair Code P003.
File an additional claim for extraordinary circumstances. A recommended repair for standard labor
must be filed first.
2/4
6/30/26, 9:01 AM
Powertrain Service Bulletin
File the claim within 14 days in accordance with the Warranty Policy.
Take-Off Parts Disposition:
Destroy 30 days after claim is paid
PRWS CLAIM CODING
Campaign
P003
Code:
ampaign
C
Type:
Claim
Engine Repair Type:
Category:
ield
F
Repair
Proactive
ustomer
C
Concern 207
Code:
Causal Code: 82
orrective
C
Action
03
Code:
esponsibility
R
CAMP
Code:
043 ailure
F
007Location:
219
Causal Part:
2350551PE
SRT Code:
25-39A
B
1.9 hours
R&R the
NOx
Sensor
After
Catalyst
and
perform the
repair
verification
per the
bulletin
procedure.
Time to
R&R
fairing,
step, or
cover for
access is
included
in this
time.
upplier
S
Code:
N/A
For campaign filing questions, reference Kenworth bulletin CB077.
Parts
Quantity
Part
Description
3/4
6/30/26, 9:01 AM
Powertrain Service Bulletin
Number
1
NOx
2350551PE SENSOR,
REAR
2
1977938PE CABLE TIE
Procedure
Please see the Links section below for procedures on removing and replacing the NOx sensor after
catalyst.
Links
P003 PACCAR MX Prognostic Replacement NOx Sensor After Catalyst Chassis List
P003 PACCAR MX Prognostic Replacement NOx Sensor After Catalyst Procedure
4/4
6/30/26, 9:01 AM
Powertrain Service Bulletin
P003: PACCAR MX Prognostic Replacement: NOx Sensor
After Catalyst
Number
Edit
Clone
P003
Subject
PACCAR MX Prognostic Replacement: NOx Sensor After Catalyst
Date
6/30/2026
Revision
06/30/2026: Bulletin has been published to the Powertrain Service Bulletins section of PACCAR.net.
Condition
Leveraging PACCAR’s advanced Prognostic prediction algorithms, certain PACCAR MX-11 and MX-13
EMY 2024-2026 engines will receive proactive replacement instructions for the NOx sensor after catalyst
to maximize uptime and maintain optimal performance.
P003 must be flagged and open in SIR at the time of the Repair Order (RO) open date to qualify.
Only trucks with an active standard or applicable extended warranty will be included in this campaign.
Trucks flagged in SIR whose warranty expires will be removed. If a repair is performed on a chassis
flagged in SIR after warranty expiration, PACCAR will consider payment on a case-by-case basis.
Chassis Affected
Certain chassis equipped with PACCAR MX-11 and MX-13 EMY 2024-2026 engines will be identified
through the Prognostic Program in SIR as described above
Action
Prognostic Campaign
Service all chassis affected that enter your dealership, even if the customer has no issue with the
chassis.
1. Review the attached chassis list for your dealer code and schedule your customer(s) for service if
their chassis is on the list.
2. In Service Management, select campaign P003 to add it to the case. If the unit is released back
into service without performing the repair, make sure to also release the campaign in Service
1/4
6/30/26, 9:01 AM
Powertrain Service Bulletin
Management.
3. If you are not using Service Management to start repair orders, review SIR for Complete next to the
P003 campaign code prior to performing this repair.
4. Follow the procedures in the Links section to remove and replace the NOx sensor after catalyst.
Warranty
Starting on 10/27/2025 Peterbilt will pay for parts at dealer net plus applicable mark-up and labor.
PACCAR will identify and load chassis to PRWS and SIR.
P003 must be flagged and open in SIR at the time of the RO open date to qualify.
1.9 hours to R&R the NOx sensor after catalyst and perform the repair verification per the bulletin
procedure. Select Recommended Repair Code P003.
File an additional claim for extraordinary circumstances. A recommended repair for standard labor
must be filed first.
2/4
6/30/26, 9:01 AM
Powertrain Service Bulletin
File the claim within 14 days in accordance with the Warranty Policy.
Take-Off Parts Disposition:
Destroy 30 days after claim is paid
PRWS CLAIM CODING
Campaign
P003
Code:
ampaign
C
Type:
Claim
Engine Repair Type:
Category:
ield
F
Repair
Proactive
ustomer
C
Concern 207
Code:
Causal Code: 82
orrective
C
Action
03
Code:
esponsibility
R
CAMP
Code:
043 ailure
F
007Location:
219
Causal Part:
2350551PE
SRT Code:
25-39A
B
1.9 hours
R&R the
NOx
Sensor
After
Catalyst
and
perform the
repair
verification
per the
bulletin
procedure.
Time to
R&R
fairing,
step, or
cover for
access is
included
in this
time.
upplier
S
Code:
N/A
For campaign filing questions, reference Peterbilt Warranty Procedure Manual – Section 8.
Parts
Quantity
Part
Description
3/4
6/30/26, 9:01 AM
Powertrain Service Bulletin
Number
1
NOx
2350551PE SENSOR,
REAR
2
1977938PE CABLE TIE
Procedure
Please see the Links section below for procedures on removing and replacing the NOx sensor after
catalyst.
Links
P003 PACCAR MX Prognostic Replacement NOx Sensor After Catalyst Chassis List
P003 PACCAR MX Prognostic Replacement NOx Sensor After Catalyst Procedure
4/4
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TSB/Document ID: P003
Replacement Service Bulletin Number:
MFR Communication Date: 2026-06-30
MFR Internal Campaign ID/Software Version:
Communication Type: Service Campaign
NHTSA Components: ENGINE
MFR Component System:
MFR Component Subsystem:
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