WI21-006

Daimler Trucks North America
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For questi ons, comments, or to subm it an inquiry, go to:
DTNAConnect > My Applications > WSC
WARRANTY DEPARTMENT
6121 N Cutter Circle, Suite A
Portland, Oregon 97217-4 09 0
Please distribute to:
Dealer Principal, Warranty Manager, Service Manager, Parts Manager, Sales Manager
Freightliner Dealers
 Direct Warranty Customers
 Sales Terms (DTR)
Western Star Dealers
 Export
 Used Product (DTR)
FCCC Dealers
 DDC Distributors
 Travel Centers of America/Petro:Lube
Thomas Built Bus Dealers
WARRANTY INFORMATION LETTER
No.
Release
Effective
WI21-006
02/15/2021
02/15/2021
Subject
Detroit NOx Sensor Circuit Fault Codes - Claim Guidelines
 Overview
In 2019, to increase repair efficiency and customer throughput, DTNA modified troubleshoo tin g, rep air
procedures, and Standard Repair Times (SRTs) for Detroit NOx sensor circuit fault codes in GHG17 af ter
treatment systems. However, recent claim data indicates that a high number of NOx sensor claims,
especially those for circuit fault codes, get returned for corrections or modified for labor-related reasons.
Please review the fault codes and claim guidelines in this letter to ensure any internal tools (e.g.,
templates, cheat sheets, guides, etc.) that a service location uses are up to date. In addition, page 2
contains a NOx sensor circuit fault code sample with notes and screenshots so that after repairs are
finished, claims can be created for maximum recovery.
 Fault
Codes
Guidelines in this letter apply to these after treatment control module (ACM) fault codes:
• SPN 3216/FMI 20
• SPN 520355/FMI 20
• SPN 520365/FMI 5
• SPN 3216/FMI 21
• SPN 520355/FMI 21
• SPN 520366/FMI 3
• SPN 3217/FMI 3
• SPN 520363/FMI 3
• SPN 520366/FMI 5
• SPN 3217/FMI 5
• SPN 520363/FMI 5
• SPN 520367/FMI 3
• SPN 3226/FMI 20
• SPN 520364/FMI 3
• SPN 520367/FMI 5
• SPN 3226/FMI 21
• SPN 520364/FMI 5
• SPN 520368/FMI 14
• SPN 3227/FMI 5
• SPN 520365/FMI 3
• SPN 520368/FMI 31
Technicians are responsible for following troubleshooting and workshop manuals. Verif icatio n o f f ault
codes occurs by cycling the ignition and no extra verification time is necessary for these repairs. If oth er
fault codes are present that require validation, the applicable SRT(s) will be accepted on associated
claims. Time required for diagnostic issues outside DTNA’s documentation should be submitted as
Diagnostic, as applicable.
 Labor on
Claims
For the fault codes in this letter, labor on circuit claims should generally be:
• Computer Hookup Used in Vehicle Diagnostics (939-6010A)
• One (1) of these SRTs:
o ATS – Inlet NOx Sensor, One Box, R&R (246-6177E)
o ATS – Outlet NOx Sensor, One Box, R&R (246-6172E)
o ATS – NOx Sensors, Both, One Box, R&R (246-6189E)
• Admin SRT (939-6010A)
The Computer Hook-Up Standard Diagnostic Time (SDT) with the applicable NOx sensor R&R SRT include
all necessary diagnostic and repair tasks. Therefore, additional SDTs, such as those listed below, are n o t
accepted on circuit fault code claims:
• ATS – NOx Sensor Diagnostics – Moderate (246-062CE)
• ATS – NOx Sensor Diagnostics – Difficult (246-062EE)
WARRANTY INFORMATION LETTER
Verify latest version online; access Warranty Information Letters at DTNAConnect > Warranty Lit > Warranty Letters.
DISCLAIMER: The information contained in this letter supersedes and supplements any related policies and procedures in the Warranty Manual and/or
previously released letters. Failure to read or distribute this letter will not exempt addressees from compliance with the information contained herein.
Warranty Inform ation Letter
Copyright © Daimler Trucks North America LLC. All rights reserved.
No. : WI21-006
1 of 2
Daimler Trucks North America LLC is a Daimler company.
Revi sed: 2/10/21
Daimler Trucks North America
For questi ons, comments, or to subm it an inquiry, go to:
DTNAConnect > My Applications > WSC
WARRANTY DEPARTMENT
6121 N Cutter Circle, Suite A
Portland, Oregon 97217-4 09 0
SAMPLE: NOx Sensor Circuit Fault Code With Customer Complaint, Troubleshooting, and OWL Labor
•
Scenario: A NOx sensor circuit fault code sets a malfunction indicator lamp (MIL)
•
Claim Narrative Contains Customer Complaint, Technician’s Diagnostic Steps, and Repair Validation:
•
Electronic Troubleshooting for the Fault Code Retrieved
Adding Labor
•
SDT Steps Match the Technician’s Diagnostic Path
•
Labor on Claim Corresponds to Technician’s Narrative
WARRANTY INFORMATION LETTER
Verify latest version online; access Warranty Information Letters at DTNAConnect > Warranty Lit > Warranty Letters.
DISCLAIMER: The information contained in this letter supersedes and supplements any related policies and procedures in the Warranty Manual and/or
previously released letters. Failure to read or distribute this letter will not exempt addressees from compliance with the information contained herein.
Warranty Inform ation Letter
Copyright © Daimler Trucks North America LLC. All rights reserved.
No. : WI21-006
2 of 2
Daimler Trucks North America LLC is a Daimler company.
Revi sed: 2/10/21