2021 Freightliner Cascadia Engine and Engine Cooling Technical Service Bulletins (2024)

TSB Number:
FAB153
NHTSA Number:
10193705
TSB Date:
December 1, 2013
Date Added to File:
May 17, 2021
Failing Component:
Engine And Engine Cooling
Summary:
Freightliner action bulletin fab153 new harness highway for cascadia

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TSB Number:
TECHTALK566191K
NHTSA Number:
10191821
TSB Date:
April 12, 2021
Date Added to File:
May 6, 2021
Failing Component:
Engine And Engine Cooling
Summary:
Tech talk discussion on spn 61683 fmi 16 data valid but above normal operating range - moderately severe level.

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TSB Number:
WI21-009
NHTSA Number:
10190551
TSB Date:
April 19, 2021
Date Added to File:
April 23, 2021
Failing Component:
Engine And Engine Cooling
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 ap

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TSB Number:
SF619
NHTSA Number:
10189616
TSB Date:
March 30, 2021
Date Added to File:
March 30, 2021
Failing Component:
Engine And Engine Cooling
Summary:
Field service campaign for cascadia cummins natural gas engine exhaust shield. On certain vehicles, there may be early heat degradation at the front right cab mount due to excessive heat exposure. An exhaust shield will be installed on all

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TSB Number:
CALFTL49-002
NHTSA Number:
10189344
TSB Date:
March 8, 2021
Date Added to File:
March 25, 2021
Failing Component:
Engine And Engine Cooling
Summary:
Customer advisory letter for adding exhaust shim to ats exhaust outlet and replacing exhaust elbow and clamp. An undersized ats outlet pipe was installed on these vehicles, causing the exhaust clamp used to fasten the exhaust elbow to not c

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TSB Number:
SB49-038
NHTSA Number:
10189320
TSB Date:
March 16, 2021
Date Added to File:
March 23, 2021
Failing Component:
Engine And Engine Cooling
Summary:
Revised freightliner service bulletin for netized fill neck for six-gallon def tanks. A design change removed the magnets from the fill necks for some 6-gallon diesel exhaust fluid (def) tanks. If the vehicle is equipped with a non-magnetic

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TSB Number:
TECHTALK8126
NHTSA Number:
10188122
TSB Date:
February 10, 2021
Date Added to File:
March 3, 2021
Failing Component:
Engine And Engine Cooling
Summary:
Tech talk discussion on d20m8 having updates greater than recall requires in server.

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TSB Number:
WI21-004
NHTSA Number:
10187900
TSB Date:
February 1, 2021
Date Added to File:
March 1, 2021
Failing Component:
Engine And Engine Cooling
Summary:
Warranty information letter for detroit resources: exploded view dd platform and dt12 posters. Detroit's techcomm team created visual aids for the network and released exploded view posters for dd platform engines. In early 2021, detroit ad

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TSB Number:
21TS-04
NHTSA Number:
10187836
TSB Date:
February 19, 2021
Date Added to File:
March 1, 2021
Failing Component:
Engine And Engine Cooling
Summary:
Technical service letter for gen 5 dd15 instrument panel oil pressure gauge operation. Gen 5 dd15 equipped units have been brought in for service with a complaint of the instrument panel oil pressure gauge not moving during unit operation a

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TSB Number:
21OEM-06
NHTSA Number:
10187835
TSB Date:
February 19, 2021
Date Added to File:
March 1, 2021
Failing Component:
Engine And Engine Cooling
Summary:
Starting on november 23, 2020, diagnosticlink 8.13 (build 4527) was made available. Current subscribers of diagnosticlink 8.11 or 8.12 may upgrade to diagnosticlink 8.13 at no cost. All dtna service shops & oem locations are required to mai

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TSB Number:
20TS-07REV
NHTSA Number:
10187833
TSB Date:
February 19, 2021
Date Added to File:
March 1, 2021
Failing Component:
Engine And Engine Cooling
Summary:
Revised technical service letter for cold weather faults on ghg17/21 dd13 with mcm software version 14. Due to colder weather, there may be an increase in the frequency of faults, noted below, on ghg17/21 dd13 trucks built after june 5th 20

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TSB Number:
WI21-006
NHTSA Number:
10187444
TSB Date:
February 15, 2021
Date Added to File:
February 25, 2021
Failing Component:
Engine And Engine Cooling
Summary:
Warranty information letter for detroit nox sensor circuit fault codes - claim guidelines.

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TSB Number:
CALFTL01-003
NHTSA Number:
10186665
TSB Date:
January 29, 2021
Date Added to File:
February 3, 2021
Failing Component:
Engine And Engine Cooling
Summary:
Customer advisory letter for gen 5 dd15 proactive turbocharger replacement.

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See Also
Freightliner Diagnostic SPN. MID, PID, SID, FMI - DTC2018 Freightliner Cascadia Technical Service Bulletins2018 Freightliner Cascadia Technical Service BulletinsApril 9, 2024-Security and Quality Rollup for .NET Framework 2.0, 3.0 for Windows Server 2008 SP2 (KB5036625)

TSB Number:
TECHTALK6985
NHTSA Number:
10186542
TSB Date:
January 7, 2021
Date Added to File:
February 1, 2021
Failing Component:
Engine And Engine Cooling
Summary:
Tech talk discussion on oil filter.

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TSB Number:
TECHTALK7644
NHTSA Number:
10186531
TSB Date:
February 1, 2021
Date Added to File:
February 1, 2021
Failing Component:
Engine And Engine Cooling
Summary:
Tech talk discussion on possible new regen strategy on ghg 17.

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TSB Number:
21TS-01
NHTSA Number:
10185931
TSB Date:
January 25, 2021
Date Added to File:
January 27, 2021
Failing Component:
Engine And Engine Cooling
Summary:
Technical service letter for detroit bearing failures - standard diagnostic times. Dtna is increasing repair strategies for determining the root cause of detroit dd heavy duty lower end bearing failures. To support this strategy change, det

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TSB Number:
WI21-003
NHTSA Number:
10185897
TSB Date:
January 25, 2021
Date Added to File:
January 27, 2021
Failing Component:
Engine And Engine Cooling
Summary:
Warranty information letter for detroit bearing failures - standard diagnostic times. Dtna is increasing repair strategies for determining the root cause of detroit dd heavy duty lower end bearing failures. To support this strategy change,

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TSB Number:
SS1034762UPDATE
NHTSA Number:
10185899
TSB Date:
January 5, 2021
Date Added to File:
January 25, 2021
Failing Component:
Engine And Engine Cooling
Summary:
This service solution has been superseded by service bulletin sb54-338. Service solution for p4 cascadia front hvac evaporator freezing. Front evaporator freezes creating ice buildup, reducing airflow through the vents.

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TSB Number:
WI21-001
NHTSA Number:
10185896
TSB Date:
January 17, 2021
Date Added to File:
January 25, 2021
Failing Component:
Engine And Engine Cooling
Summary:
Warranty information letter for detroit new service replacement engine srt update. While validating standard repair times (srts) for detroit's new gen 5 engine series, dtna discovered an error in a pre-gen 5 srt for the new service replacem

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TSB Number:
SB54-337
NHTSA Number:
10185688
TSB Date:
January 20, 2021
Date Added to File:
January 21, 2021
Failing Component:
Engine And Engine Cooling
Summary:
Freightliner service bulletin for coolant level sensor wiring repair. On new cascadia vehicles, depending on the tension applied to the harness located at the coolant level sensor and its mounting locations, wiring damage can occur, resulti

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TSB Number:
TECHTALK7776
NHTSA Number:
10184902
TSB Date:
December 17, 2020
Date Added to File:
December 30, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Tech talk continued discussion on 2021 cascadia opt idle issues.

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TSB Number:
18SP744
NHTSA Number:
10183954
TSB Date:
November 30, 2020
Date Added to File:
December 7, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Special publication letter for two-filter fuel system km59 gen1 dd15 dd16 severe duty high pressure fuel rail feed lines service kit.

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TSB Number:
20TS-09
NHTSA Number:
10183733
TSB Date:
December 6, 2020
Date Added to File:
December 6, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Technical service letter for spn 3711 fmi 31 on ghg17 dd15 trucks.

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TSB Number:
TECHTALK7785
NHTSA Number:
10182012
TSB Date:
October 20, 2020
Date Added to File:
November 2, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Tech talk discussion on dl8 cgw connection issues for d20m8.

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TSB Number:
TECHTALK7776
NHTSA Number:
10182010
TSB Date:
October 9, 2020
Date Added to File:
November 2, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Tech talk discussion on 2021 cascadia opt idle issues.

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TSB Number:
TECHTALK7771
NHTSA Number:
10182006
TSB Date:
October 9, 2020
Date Added to File:
November 2, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Tech talk discussion on dd harness chaffe.

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TSB Number:
TECHTALK7750
NHTSA Number:
10181992
TSB Date:
October 6, 2020
Date Added to File:
November 2, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Tech talk discussion on detroit d20m8 asm deleted.

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TSB Number:
TECHTALK7735
NHTSA Number:
10181974
TSB Date:
October 1, 2020
Date Added to File:
November 2, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Tech talk discussion on 1 aftertreatment system problem detected.

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See Also
What Is Fault Code SPN 2011 FMI 9? (Detroit, Freightliner)

TSB Number:
20TS-07
NHTSA Number:
10181369
TSB Date:
October 20, 2020
Date Added to File:
October 20, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Technical service letter for cold weather faults on ghg17/21 dd13 with mcm software version 14. Due to colder weather, there may be an increase in the frequency of faults, noted below, on ghg17/21 dd13 trucks built after june 5th 2019. This

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TSB Number:
SB09-038
NHTSA Number:
10181322
TSB Date:
October 16, 2020
Date Added to File:
October 19, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Freightliner service bulletin for air cleaner support bracket bolt replacement. On new cascadia vehicles, the air filter housing rear mounting bracket bolts may be found to be loose or missing. If allowed to continue, this can lead to compl

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TSB Number:
20TS-06
NHTSA Number:
10181052
TSB Date:
October 12, 2020
Date Added to File:
October 13, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Ddc technical service letter for ghg17 dd platform heavy duty oil pan drain plug inserts. Some ghg17 dd platform heavy duty oil pans may experience an issue with the oil pan drain plug insert spinning during removal or installation while co

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TSB Number:
TECHTALK7691
NHTSA Number:
10180593
TSB Date:
September 16, 2020
Date Added to File:
October 1, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Tech talk discussion about common powertrain controller(cpc) not configured to cascadia

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TSB Number:
20TS-03REV2
NHTSA Number:
10180503
TSB Date:
September 29, 2020
Date Added to File:
October 1, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Revised technical service letter for dd heavy duty platform belt tensioner change. A newly designed, dual-arm friction shoe damping tensioner was implemented for the dd heavy duty platform. The revision includes additional information on re

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TSB Number:
TECHTALK7735
NHTSA Number:
10180459
TSB Date:
September 29, 2020
Date Added to File:
September 30, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Tech talk discussion on aftertreatment system problem detected after performing d20m8 recall.

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TSB Number:
TECHTALK7709
NHTSA Number:
10180455
TSB Date:
September 24, 2020
Date Added to File:
September 30, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Tech talk discussion on inaccurate reading def gauge.

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TSB Number:
TECHTALK7663
NHTSA Number:
10180426
TSB Date:
September 4, 2020
Date Added to File:
September 30, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Tech talk discussion on d20m8-a no updated cpca software available.

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TSB Number:
TECHTALK7644
NHTSA Number:
10180410
TSB Date:
September 4, 2020
Date Added to File:
September 30, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Tech talk discussion on possible new regen strategy on ghg 17.

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TSB Number:
TECHTALK7679
NHTSA Number:
10180382
TSB Date:
September 15, 2020
Date Added to File:
September 30, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Tech talk discussion on repair verification for codes like 'low air flow' when a trailer is not available.

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TSB Number:
SF607
NHTSA Number:
10179807
TSB Date:
September 17, 2020
Date Added to File:
September 17, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Field service campaign for freightliner cascadia lg1 radiator inlet hoses. The radiator and upper hose assembly have an alternate design available which may extend the life of the radiator hose and prevent leaking connectors.

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TSB Number:
20CSA-15
NHTSA Number:
10179249
TSB Date:
August 31, 2020
Date Added to File:
September 1, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Customer service announcement for release of diagnosticlink 8.12 service pack 2. On thursday, september 3, 2020, service pack (sp) 2 for diagnosticlink 8.12 standard and professional will be made available to download from the detroit diese

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TSB Number:
ICI20-026
NHTSA Number:
10179061
TSB Date:
August 26, 2020
Date Added to File:
August 31, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Important campaign information letter informing that revised bulletins for detroit diesel campaigns d20r1rev1 and d20m8rev1 have been posted on dtnaconnect.

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TSB Number:
D20R1REV1
NHTSA Number:
10179054
TSB Date:
August 25, 2020
Date Added to File:
August 31, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Revised detroit emissions recall for daimler trucks north america llc, on behalf of its detroit powertrain division, has determined that some model year 2020 ghg21 dd13 engines require reprogramming of the mcm to meet certification. Note: r

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TSB Number:
D20M8REV1
NHTSA Number:
10178948
TSB Date:
August 25, 2020
Date Added to File:
August 28, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Revised detroit field service campaign for ghg17 & ghg21 detroit dd13, dd15, and dd16 acm software reprogramming. Note: reference 20ts-04 ??A?A? Detroit??A?A? Cpc501t ghg21 only; bootloader update if new cascadia cpc501t is not at the softw

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TSB Number:
20TS-05
NHTSA Number:
10177692
TSB Date:
July 27, 2020
Date Added to File:
July 30, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Technical service letter for epa10, ghg14, ghg17 diesel particulate filter (dpf) compatibility. Note: this document supersedes 14 ts-25 and 15 ts-8. Detroit diesel has determined that some, diesel particulate filters (dpfs) are compatible I

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TSB Number:
20OEM-05
NHTSA Number:
10177691
TSB Date:
July 27, 2020
Date Added to File:
July 30, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Oem and distributor announcement for diagnosticlink 8.12 (build 4527) was made available. All dtna service shops & oem locations are required to maintain the latest version of software on each of their stations.

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TSB Number:
20CSA-10
NHTSA Number:
10177690
TSB Date:
July 27, 2020
Date Added to File:
July 30, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Customer service announcement informing that service pack (sp) 1 for diagnosticlink??A???A???A???A???A???A???A???A? 8.12 standard and professional is available to download from the detroit diesel server.

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TSB Number:
TS1033014
NHTSA Number:
10177608
TSB Date:
March 9, 2017
Date Added to File:
July 30, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Training solutions for fuel leak found at high pressure fuel pump weep hole for heavy duty dd engines. Occasionally we see trucks come in with fuel leaking from the high pressure fuel pump weep hole. This is not a defect in the pump and fur

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TSB Number:
20CSA-09
NHTSA Number:
10177657
TSB Date:
July 23, 2020
Date Added to File:
July 27, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Customer service announcement for diagnosticlink software update reminder. Due to various software changes and fixes, vehicles will require diagnosticlink 8.12 to perform functional programming. Failure to use this version may cause errors,

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TSB Number:
SB54-330
NHTSA Number:
10177001
TSB Date:
June 29, 2020
Date Added to File:
July 2, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Freightliner service bulletin for compressor bracket modification to reduce harness chafing. New cascadia vehicles with detroit hdep engines may experience engine harness chafing at the harness support bracket that mounts on the air compres

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TSB Number:
20CSA-08
NHTSA Number:
10176790
TSB Date:
June 10, 2020
Date Added to File:
June 25, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Customer service announcement for release of diagnosticlink 8.12. On wednesday, june 10, 2020, diagnosticlink 8.12 will be made available for download from the ordering system. Current subscribers of diagnosticlink 8.Xx can upgrade to diagn

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TSB Number:
20TS-03REV
NHTSA Number:
10176789
TSB Date:
June 25, 2020
Date Added to File:
June 25, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Revised technical service letter for dd heavy duty platform belt tensioner change. A newly designed, dual-arm friction shoe damping tensioner was implemented for the dd heavy duty platform.

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TSB Number:
D20M3
NHTSA Number:
10176737
TSB Date:
June 25, 2020
Date Added to File:
June 25, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Detroit field service campaign for detroit export dd15 and dd13 valve lash adjustment, throttle connector o-ring, and tc air line spacer installation.

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TSB Number:
WI20-009
NHTSA Number:
10176258
TSB Date:
June 10, 2020
Date Added to File:
June 12, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Warranty information letter for a warranty service replacement engine program clarification. Detroit established the warranty service replacement engine program to support an unrepairable catastrophic engine failure due to manufacturing def

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TSB Number:
WI20-004
NHTSA Number:
10173907
TSB Date:
April 21, 2020
Date Added to File:
April 22, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Warranty information letter for warranty long block program change. The detroit reman long block program has expanded. The expansion reduces complexity in ordering reman engines and promotes stocking reman engines to meet uptime commitments

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TSB Number:
SS1034686
NHTSA Number:
10173647
TSB Date:
April 8, 2020
Date Added to File:
April 8, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Service solution for p4 new cascadia with manual transmissions does not use bottom of clutch switch for starting. On the prior p3 legacy cascadia vehicles with manual transmission, the bottom of clutch (boc) switch could be uses as an inter

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TSB Number:
SS1034682
NHTSA Number:
10172976
TSB Date:
March 30, 2020
Date Added to File:
March 30, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Service solution for updated common telematics platform (ctp) installation and activation procedure. Some new ctps being installed in the field have failed to activate and do not communicate with detroit connect back end. The activation of

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TSB Number:
20CSA-04
NHTSA Number:
10172649
TSB Date:
March 20, 2020
Date Added to File:
March 21, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Customer service announcement saying that service pack (sp) 3 for diagnosticlink??A? 8.11 standard and professional will be available for download from the detroit diesel server.

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TSB Number:
20TS-02
NHTSA Number:
10172148
TSB Date:
March 5, 2020
Date Added to File:
March 5, 2020
Failing Component:
Engine And Engine Cooling
Summary:
Technical service letter for dd platform heavy duty, metal in the oil and oil filter. Some engine component failures can cause metallic debris to circulate throughout the engine lubrication system. Although the oil filter will capture most

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More Freightliner Cascadia Engine and Engine Cooling Service Bulletins of Other Model Years

More Engine and Engine Cooling Service Bulletins of Other 2021 Freightliner Models

More Service Bulletins of Other 2021 Freightliner Cascadia Components

2021 Freightliner Cascadia Engine and Engine Cooling Technical Service Bulletins (2024)
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