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Service bulletins for the 2020 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.

661 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
SF6252022-10-04. Service bulletin. ELECTRICAL SYSTEM. Revised Freightliner Service Bulletin version 3 for Freightliner Cascadia 3G to 4G Common Telematics Platform (CTP) Update. Newest Revision: A screenshot of the DiagnosticLink image shown in Fig. 40, on page 31, with the message ’Activation OK’ must be kept on file with the repair order. The work instructions have been revised to account for this requirement starting with step 12, on page 31. Previous Revision: A one-time purchase of new tools is required. A USB stick, with SF625 software already loaded, along with a USB stick-to CTP adaptor harness that is On-the-Go (OTG) protocol compliant, now have part numbers available for purchase 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.
SS10345442022-07-02. Service bulletin. ELECTRICAL SYSTEM. Service Solution for SSAM Fault 520197/31 - MQ SwitchMalfunction Troubleshooting
SF6572022-07-02. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Field Service Campaign for Freightliner and Western Star CTP Software Update
CALFTL54-0242022-06-04. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Customer Advisory Letter for Cascadia CTP Not Communicating: Requires Reset.
CALFTL54-0232022-06-04. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. Customer Advisory Letter for Cascadia CTP Not Communicating: Requires Reset.
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.
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.
SS37042021-06-10. Service bulletin. ELECTRICAL SYSTEM. Cascadia Fault codes 6.0
SS10331212021-06-09. Service bulletin. ELECTRICAL SYSTEM. SS 1033121 Adding a Fan Override Switch (Legacy Cascadia)
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
TechTalk5667712021-06-03. Service bulletin. SERVICE BRAKES, AIR; ELECTRICAL SYSTEM; ELECTRONIC STABILITY CONTROL:AUTOMATIC (ASC). Tech Talk Discussion P4 New Cascadia ABS Fault Code 520247/31 - Failure Memory Bit (ESC) Condition Exists
TechTalk357822021-06-02. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Tech Talk discussion on J1939 datalink failure codes.
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.
TechTalk5660052021-05-06. Service bulletin. ELECTRICAL SYSTEM; SERVICE BRAKES, AIR. Tech Talk discussion on P4 New Cascadia ABS Fault Code 520247 31 --Failure Memory Bit (ESC) Condition Exists.
TechTalk80602021-05-06. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT; ENGINE AND ENGINE COOLING. Tech Talk continuing discussion on CGW lost communication with cpc.
TechTalk181412021-05-05. Service bulletin. SERVICE BRAKES, AIR; ELECTRICAL SYSTEM. Tech Talk discussion on Cascadia glider issues.

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