2021 Freightliner Cascadia Technical Service Bulletins

509 technical service bulletins (TSBs) are on record for the 2021 Freightliner Cascadia. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 10251202Feb 20, 2024Engine cooling. Important Campaign Information letter for FL974 - Revised Bulletin & Population
• 10251200Feb 20, 2024Engine cooling. Revised Emissions Recall: Cummins DEF Sensor Shortage. REVISION: Some vehicles formerly in Group F have been moved to Group G and have been assigned a new part number as specified in Table 1. An SRT for 'Calibration Code Only: Update or Confirm' has been added, as shown in Table 2, to be used when a new DEF header is not required. There have been some other minor changes to the work instructions and SRT times.
• 10251203Feb 14, 2024Vehicle speed control. Important Campaign Information letter for SF669 Campaign Suspended
• 10249510Jan 29, 2024Engine cooling. Important Campaign Information letter for DDC D21M6 and D22M6 - Campaign Extended
• 10249516Jan 19, 2024Engine cooling. Emissions Recall: Cummins DEF Sensor Shortage
• 10248135Dec 19, 2023Vehicle speed control. Field Service Campaign for Adaptive Cruise Control
• 10246175Nov 3, 2023Equipment, Electrical system. Revised Field Service Campaign for Common Telematics Platform Software Update
• 10244759Oct 11, 2023Equipment. Service Bulletin for Relocating the Bluetooth Microphone
• 10244760Oct 5, 2023Body and structure. Revised Service Bulletin for Cab Isolator for Trucks Domiciled in Mexico
• 10243342Sep 29, 2023Other or unknown. Service Solution for P4 New Cascadia Web Mounted 5th Wheel Ramps
• 10243337Sep 14, 2023Body and structure. Revised Freightliner Service Bulletin for Cab Isolator for Trucks Operating in Extreme Conditions. Description of Revisions: This bulletin replaces the version dated June 2023. The title has been updated.
• 10243335Sep 12, 2023Engine cooling. Customer Advisory Letter for Towing Related to Low Coolant Faults
• 10241574Aug 11, 2023Body and structure. Freightliner Parts Bulletin for Aero Bumper Air Dam Part Supersession
• 10241572Aug 3, 2023Body and structure. Customer Advisory Letter for Center Drive Wheel Fairing Frame Rail Support Bracket Inspection
• 10240131Jul 13, 2023Visibility (wipers, defrost, mirrors). Revised Service Bulletin for Updating HVAC ECU Software to Fix Front HVAC Evaporator Freezing and Improve Espar Heater Cool Down. Description of Revisions: This bulletin replaces the version dated December 2021. The general information and warranty information has been updated.
• 10238260Jun 2, 2023Equipment, Electrical system. Field Service Campaign for Common Telematics Platform Software Update
• 10235647Apr 20, 2023Equipment. Revised Freightliner Field Service Campaign for TomTom Android Black Box Update
• 10235639Apr 10, 2023Equipment. Important Campaign Information Letter for SF662 TomTom Work Instructions - Correction to Fuse Number.
• 10233951Mar 31, 2023Steering. Important Campaign Information letter communicating that SF660 Field Service Campaign is Replaced by FL967.
• 10233947Mar 31, 2023Engine cooling. Revised Detroit Field Service Campaign for Gen 5 Customer Demo Unit (CDU) and Pre-Series Unit Retrofits. D21M6 REVISION : Page 1 of the bulletin under "Replacement Parts" and "IMPORTANT" have been revised.
• 10233404Mar 20, 2023Equipment. Field Service Campaign for TomTom Android Black Box Update
• 10230654Jan 20, 2023Engine cooling. Important Campaign Information Letter for DDC D21M6, Termination Date Extended
• 10230657Jan 11, 2023Electrical system. Customer Advisory Letter for New Cascadia Vehicles Equipped With D-Climate P4 Ground Cable Anti-Corrosion Sealer Issue.
• 10230910Jan 9, 2023Steering. Revised Field Service Campaign for Drag Link Tapered Joint
• 10228679Dec 14, 2022Steering. Field Service Campaign for Drag Link Tapered Joint
• 10227061Nov 1, 2022Equipment, Electrical system. My Communications for SF625 and SF657 Pre-Flashed USB Tools. The download files for SF625 and SF657 are no longer available in our download center. In order to perform these updates you will need to order the Pre-Flashed USB tools from the PDC. This will allow for a more efficient and timely service.
• 10225500Oct 31, 2022Engine cooling, Electrical system. Service Solution for DPF Harness Rub-Chafe onTrans-Wire Braided Air Hose.
• 10225499Oct 31, 2022Lane departure. Service Solution for Detroit Side Object Detection Harness Rub-Chafe on Bracket
• 10222238Sep 28, 2022Vehicle speed control. Service Solution for New Cascadia Low PowerComplaint. When additional floor heat insulation is ordered, the throttle pedal in some cases (when the throttle is fully depressed) may not reach 100% (full throttle). This can also occur if aftermarket floor mats are added to the vehicle.
• 10222229Sep 28, 2022Electrical system. Freightliner Service Bulletin for ABS mBSP ECU Software Update Fault Code 629-11. New Cascadia vehicles manufactured from September 12, 2018 through March 22, 2021 that are equipped with WABCO Anti-Lock Braking System (ABS) controllers log excessive 629-11 fault codes, which can lead to additional downstream fault codes. The ABS controller will receive a software update to eliminate erroneous fault codes and ensure…
• 10222222Sep 23, 2022Equipment, Electrical system. Important Campaign Information Letter for SF657 – Revised Bulletin. Newest Revision: A screenshot of the DiagnosticLink screen showing in Fig.15 showing 'Activation OK' must be kept on file with the repair order. This letter is to inform you that tools are now required for the SF657 repair, and the work instructions have been updated.
• 10222237Sep 20, 2022Electrical system, Equipment. Revised Freightliner and Western Star CTP Software Update REVISION: New tools are required. The USB stick with SF657 software already loaded, along with the USB stick to CTP adaptor harness that is On-the-Go (OTG) protocol compliant, now have part numbers that can be purchased through the parts distribution center (PDC).
• 10222228Sep 12, 2022Transmission and drivetrain. Freightliner Service Bulletin for Resetting the Maintenance System for DT12 Oil Changes. This service bulletin describes required maintenance system parameter changes that apply to New Cascadia vehicles with Detroit DT12 transmissions used for line haul applications.
• 10219008Aug 29, 2022Equipment. Service Solution for MS01T Maintenance System FaultCode Diagnosis
• 10219007Aug 29, 2022Equipment. Service Solution for New Cascadia Replacing Common Telematics Platform (CTP) 1 With a CTP2
• 10219276Aug 26, 2022Lane departure. Revised Field Service Campaign for Cascadia Lane Assist Software.
• 10218999Aug 10, 2022Transmission and drivetrain. Customer Advisory Letter for Eaton Endurant Transmissions Require Oil Coalescing Air Dryer Cartridges
• 10216939Jul 28, 2022Visibility (wipers, defrost, mirrors). Main Mirror Arm Covers Loose - Falling Off. Lower arm covers designs have clips that hold the cover on but over time the clips can fail and allow the covers to become loose or fall off.
• 10216933Jul 1, 2022Visibility (wipers, defrost, mirrors). Revised Freightliner Service Bulletin for HVAC Software Updates. Description of Revisions: This bulletin replaces the version dated 06/21/2022. Formatting errors have been corrected.
• 10214909Jun 23, 2022Electrical system, Equipment. Field Service Campaign for Freightliner and Western Star CTP Software Update
• 10214904Jun 20, 2022Visibility (wipers, defrost, mirrors). Freightliner Service Bulletin for HVAC Software Updates
• 10213233May 31, 2022Fuel system. Service Solution for 100/120/130 Gallons Fuel Tanks interference/rubbing with fairing bracket.
• 10213226May 17, 2022Electrical system, Equipment. Revised Field Service Campaign for Cascadia CTP Reset. Certain vehicles equipped with DTNAs proprietary Common Telematics Platform (CTP) are not communicating; therefore they are unable to benefit from over-the-air software updates. The CTP will be reset and some will also be initialized.
• 10213222May 10, 2022Transmission and drivetrain. Updated Freightliner Service Bulletin for Meritor Rear Axle Temperature Parameters. This bulletin replaces the version dated 1/22/2022. The build date in General Information has been added.
• 10213214May 10, 2022Engine cooling. Important Campaign Information for DDC D21M6 - Third Revised Bulletin. This letter is to inform you that a revised bulletin for DETROITTM Field Service Campaign D21M6 - Gen 5 Customer Demo Unit (CDU) and Pre-Series Unit Retrofits is available on DTNAConnect.
• 10213213May 10, 2022Engine cooling. Revised Detroit Field Service Campaign for Gen 5 Customer Demo Unit (CDU) and Pre-Series Unit Retrofits.
• 10210557Apr 25, 2022Forward collision avoidance. Service Solution for Cummins Engine andWABCO OnGuard (Obtaining Cruise When AdaptiveCruise Is Interrupted). Interruption of the forward radar system results in loss of both standard and adaptive cruise functions. The OnGuard system will recover (self-heal), once the issue goes away, but the drivercannot get Adaptive Cruise Control functional until the ignition switch is cycled. Applies to all New Cascadia vehicles…
• 10210555Apr 20, 2022Visibility (wipers, defrost, mirrors). Freightliner Parts Technical Bulletin for TufGlass Windshield Replacement. Effective April 20, 2022, owners of New Cascadia vehicles have the option of replacing factory-installed standard windshields with L20 TufGlass windshields.
• 10210548Apr 13, 2022Transmission and drivetrain. Important Campaign Information Letter for DDC D21M1 Termination Date Extended. This letter is to inform you that a revised bulletin for Detroit Diesel Field Service Campaign D21M1, DT12 Transmission Drive Shaft Cover Plug Reseal has been EXTENDED for an additional three months. Please use the extended termination date for all work under D21M1 from this point forward. REVISION: D21M1 termination date extended to…
• 10209463Mar 28, 2022Transmission and drivetrain. Revised Freightliner Service Bulletin for DT12 Transmission Control Harness Chafing the Transmission Control Module

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