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Service bulletin WI21-009

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10190551
Published by NHTSA2021-04-24
Manufacturer's numberWI21-009
Manufacturer's date2021-04-19
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

Warranty Information letter announcing that DTNA is increasing the Standard Diagnostic Times (SDTs) shown. The updated after treatment system (ATS) diesel exhaust fluid (DEF) pump times will be applied to repair orders opened on or after April 12, 2021.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine

Vehicles listed
FCCC XBP2014 to 2016
FCCC XBP2018
FCCC XCM2012 to 2015
FCCC XCP2013 to 2015
FCCC XCR2018 to 2021
FREIGHTLINER 108SD2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
FREIGHTLINER 114SD2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
FREIGHTLINER 122SD2014 to 2022
FREIGHTLINER ARGOSY2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
FREIGHTLINER BUSINESS CLASS M22007 to 2022
FREIGHTLINER CASCADIA2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
FREIGHTLINER CENTURY CLASS2008 to 2010
FREIGHTLINER COLUMBIA2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
FREIGHTLINER CORONADO2007, 2008, 2009, 2010, 2011, 2012, 2013
FREIGHTLINER ECONIC SD2019 to 2021
STERLING 95002008 to 2010
THOMAS BUILT BUSES SAF-T-LINER C22007 to 2022
WESTERN STAR 47002012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
WESTERN STAR 49002009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
WESTERN STAR 49X2021
WESTERN STAR 57002015, 2016, 2017, 2018, 2019, 2020, 2021
WESTERN STAR 69002011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
21V7150002021-09-15. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM
21V0730002021-02-12. ENGINE
20204082020-09-01. Engine
20V5270002020-09-01. ELECTRICAL SYSTEM:WIRING; ENGINE AND ENGINE COOLING
18V5810002018-08-30. ENGINE AND ENGINE COOLING:ENGINE:DIESEL
16V4160002016-06-09. ENGINE AND ENGINE COOLING:ENGINE:DIESEL
20162852016-06-06. Engine
15V8160002015-12-07. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE
20154842015-10-16. Engine
15V6200002015-10-02. ELECTRICAL SYSTEM:IGNITION:MODULE; ENGINE AND ENGINE COOLING:ENGINE

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
CXA 03_26_Surge Tank2026-04-02. Other. CX Advocate for discolored coolant surge tanks (24CSA-20)
FleetCom_Heater Core2026-01-08. Other. Fleet Communications for Heater Core Plugging
TSB54-377-FTL2026-01-07. Service bulletin. Technical Service Bulletin Low Coolant Sensor
FleetCom_SS 3163-FTL2025-12-06. Other. Fleet Communications for Power Steering Reservoir Fill Cap Venting
FleetCom_Low Coolant2025-12-05. Other. Fleet Communications for Low Coolant Sensor
CXA_10_25_Low Coolant2025-11-05. Other. CX Advocate for P4, WST X-Series, DD Engines Low/Critical Low Coolant Warnings
CXA_10_25_Conmet Oil Pan2025-11-05. Other. CX Advocate for ConMet Oil Pan Insert Additional Issues
CXA_9_25_Tech Questions2025-10-03. Other. CX Advocate for technical questions/issues raised
CXA_8_25_Tech Questions2025-09-02. Other. CX Advocate for technical questions/issues raised
24CSA-19Rev2025-09-02. Other. Revised Customer Service Annoucement for No Trouble Found Heavy Duty Engine Product (HDEP) Oil Separator Leaks