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Service bulletins for the 2021 Freightliner Cascadia

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.

509 on file from NHTSA, as of 2026-10-19.

By type

By component

Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
SS3113-FTL20222022-11-02. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. Service Solution for DPF Harness Rub-Chafe onTrans-Wire Braided Air Hose.
SF6572022-10-04. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. 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).
SB54-3592022-10-04. Service bulletin. ELECTRICAL 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 proper function.
ICI22-0442022-10-04. Service bulletin. EQUIPMENT; 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.
SF6572022-07-02. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Field Service Campaign for Freightliner and Western Star CTP Software Update
SF611REV22022-06-04. Service bulletin. ELECTRICAL 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.
SB54-3502022-03-03. Service bulletin. ELECTRICAL SYSTEM. Freightliner Service Bulletin for Battery Load Disconnect Switch Installation. Cab load disconnect switches (CLDS), also known as positive load disconnect, installed on selected vehicles can reduce battery drain when the vehicle is not operational.
SF6152021-11-03. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Stoneridge ICUC Replacement. Certain vehicles equipped with a Stoneridge instrument control unit common (ICUC) were programmed using a new method to improve efficiency and align with programming for European ICUCs. All ICUCs built using the new method are permanently in the "read only" mode, and any attempt to flash will corrupt the ICUC memory.
SF6232021-08-31. Service bulletin. ELECTRICAL SYSTEM; FORWARD COLLISION AVOIDANCE; POWER TRAIN. Field Service Campaign for Cascadia ICUC Traffic Sign Display. Certain vehicles equipped with a Detroit Assurance base package, and a DT12 transmission with intelligent powertrain management (IPM+), were not built with the Traffic Sign Display (TSD) option.
CALFTL54-0182021-08-28. Service bulletin. ELECTRICAL SYSTEM. Customer Advisory Letter for New Cascadia Aluminum Battery Cable Replacement. This customer advisory letter is intended to provide parts for inspection by DTNA Engineering to finalize a technical solution for an upcoming recall: FL893/NHTSA 21V-481.
SS3078-FTL20212021-06-26. Service bulletin. ELECTRICAL SYSTEM. Freightliner Service Solution for New Cascadia No Start and or Stalk Switch Shift Lever Right Active Fault(s). The solution applies to New Cascadia vehicles built from 1/1/2020 with Detroit Engines and DT12 transmissions.
SS37042021-06-10. Service bulletin. ELECTRICAL SYSTEM. Cascadia Fault codes 6.0
SS10331982021-06-09. Service bulletin. ELECTRICAL SYSTEM. Service Solution SS 1033198 P4 New Cascadia Refrigerator Power Supp...
SS10334522021-06-09. Service bulletin. ELECTRICAL SYSTEM. SS1033452 Setting the time in the ICUC (New Cascadia)
SS10334822021-06-09. Service bulletin. ELECTRICAL SYSTEM. SS1033482: Trailer Stop lamp activation w/ hand valve (parameter configuration) - P4 New Cascadia
SS10336382021-06-09. Service bulletin. ELECTRICAL SYSTEM. SS 1033638 - Power Window Express Down Module Discontinued
TechTalk5668272021-06-03. Service bulletin. VEHICLE SPEED CONTROL; ELECTRICAL SYSTEM. Tech Talk Discussion Powertrain Overspeed Detected
TechTalk5667762021-06-03. Service bulletin. SERVICE BRAKES, HYDRAULIC; ELECTRICAL SYSTEM. Tech Talk Discussion 2021 P4 jyst brakes drag alarm on all the time
CALFTL54-0022021-05-25. Service bulletin. ELECTRICAL SYSTEM; PARKING BRAKE. Customer Advisory Letter on Enabling Horn Alarm with the Door Open and the Park Brake Set
FAB1532021-05-18. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM; FUEL SYSTEM, GASOLINE. Freightliner Action Bulletin FAB153 New Harness Highway for Cascadia
FTLCAE167-20162021-05-17. Service bulletin. VISIBILITY; EQUIPMENT:APPLIANCE:AIR CONDITIONER; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Important Update for Parked HVAC System Options
TK-APU2021-05-10. Service bulletin. ELECTRICAL SYSTEM. Evolution APU No Regen.
TechTalk200692021-05-05. Service bulletin. ELECTRICAL SYSTEM; SUSPENSION. Tech Talk discussion on 2021 NEW CASCADIA SUSPENSION DUMP IS NOT RAISING THE SUSPENSION.
SF6182021-04-28. Service bulletin. ELECTRICAL SYSTEM. Field Service Campaign for Cascadia Cummins Acumen Edge Wiring. Certain vehicles equipped with a Cummins Acumen Edge module are not communicating and, therefore, are unable to benefit from over-the-air software updates and may not be able to connect to the Cummins digital apps.
CALFTL54-0162021-04-24. Service bulletin. ELECTRICAL SYSTEM. Customer Advisory Letter for Battery Cable Access (BCA) 29A Cable Inspection.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.