WenmarOpen by Wenmar Pro

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: Brakes are shown. Show all

Bulletins, newest first
CXA 10_25_Air Dryer Purge2025-11-06. Other. SERVICE BRAKES. CX Advocate for Experiencing Excessive Purging from Air Dryer
MYCOM_09122025-12025-10-03. Other. SERVICE BRAKES. My Communications for Parts Alert ABS Harness
CALFTL42-0072022-11-02. Service bulletin. SERVICE BRAKES, AIR. Customer Advisory Letter for Brake System Modulator Valve Evaluation.
SF622REV2022-03-03. Service bulletin. SERVICE BRAKES, HYDRAULIC. Revised Field Service Campaign for Cascadia, 49X ABS MBSP+ Controller Software Update
ICI22-0152022-03-03. Service bulletin. SERVICE BRAKES, HYDRAULIC. Important Campaign Information letter for SF622 – Addition of 8x4 Vehicles to Populationx
SF6222021-08-28. Service bulletin. SERVICE BRAKES, HYDRAULIC. Revised Field Service Campaign for Cascadia/49X ABS MBSP+ Controller Software Update. REVISION: The work instructions have been revised. Certain vehicles have a WABCO Anti-Lock Braking System (ABS) controller that logs excessive 629-11 fault codes which subsequently lead to additional downstream fault codes.
ICI21-0272021-08-28. Service bulletin. SERVICE BRAKES, HYDRAULIC. Important Campaign Information Letter for SF622 – Campaign Revision/Reactivation. This letter is to inform you that the work instructions for Field Service Campaign SF622, Cascadia/49X ABS MBSP+ Controller Software Update have been revised.
SF6222021-06-29. Service bulletin. SERVICE BRAKES, HYDRAULIC. Field Service Campaign for Cascadia/49X ABS MBSP+ Controller Software Update. Certain vehicles have a WABCO Anti-Lock Braking System (ABS) controller that logs excessive 629-11 fault codes which subsequently lead to additional downstream fault codes.
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
CALFTL42-0042021-05-26. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; SERVICE BRAKES, HYDRAULIC. Customer Advisory Letter for Drive Axle Drum Brake S-Cam U-Bolt Replacement.
CALFTL54-0092021-05-25. Service bulletin. SERVICE BRAKES; SERVICE BRAKES, AIR. Customer Advisory Letter on New Cascadia ABS Fault Codes 520216/31 and 629/11
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
TechTalk566473K2021-05-07. Service bulletin. SERVICE BRAKES, HYDRAULIC. Tech Talk discussion on DT12 Countershaft Brake Learn Dynamic Values.
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.
TechTalk181412021-05-05. Service bulletin. SERVICE BRAKES, AIR; ELECTRICAL SYSTEM. Tech Talk discussion on Cascadia glider issues.
CALFTL54-010REV32021-03-26. Service bulletin. SERVICE BRAKES, AIR:ANTILOCK:ABS WARNING LIGHT. Revised Customer Advisory Letter for ABS Warning Light Illumination with ABS code SA 11, SPN 629, FMI 11. REVISED: This CAL revises the CAL issued August 10th, 2020. Western Star 49X vehicles have been added to the CAL scope and instructions for downloading and installing software to address the ABS warning light illumination with ABS code SA 11, SPN 629, FMI 11 have replaced the corrective action of the previous CAL.
TechTalk81662021-03-03. Service bulletin. SERVICE BRAKES. Tech Talk discussion on P4 Cascadia ABS code SPN 520213 FMI 31.
SF6082021-02-26. Service bulletin. SERVICE BRAKES, AIR; SERVICE BRAKES. Field Service Campaign for Cascadia Road Train Brake System - Export Only.
Techtalk65782020-12-31. Service bulletin. SERVICE BRAKES, AIR. Tech Talk discussion on New Cascadia "low air pressure" warning light.
SB42-0792020-12-30. Service bulletin. SERVICE BRAKES. Freightliner Service Bulletin for Access to Front Brake Zerk Fittings. Certain vehicles with Detroit front axles and Meritor EX-L front air disc brakes do not have access to the front brake zerk fittings for lubrication.
SS10337002020-09-04. Service bulletin. VEHICLE SPEED CONTROL; SERVICE BRAKES. Updated Service Solution for New Cascadia Cruise Control will Not Set. Service brake state change is required to set the cruise control. Since the CPC looks to the SSAM for service brake signal the SSAM must be sending a brake signal for cruise control to function. Replaces original Service Solution from July 2018.
CALFTL54-010REV2020-09-01. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; SERVICE BRAKES, AIR:ANTILOCK:ABS WARNING LIGHT; EQUIPMENT. Revised Customer Advisory Letter for New Cascadia ABS Warning Light Illumination work instructions. Due to the enhanced vigilance of the New Cascadia ABS controller, some fault codes and indicator lights do not necessarily require immediate maintenance attention. DTNA and WABCO are currently jointly working on a long-term corrective plan for the condition. REVISED: This CAL replaces the CAL issued June 17th, 2020. The phrase "if equipped" in reference to cab load disconnect switches has been removed.
SB42-0782020-07-31. Service bulletin. SERVICE BRAKES, AIR:DRUM:SHOES/LININGS; SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DRUM:SHOES/LININGS. Freightliner Service Bulletin for Meritor Steer Axle Drum Brake Squeal. Some Cascadia and New Cascadia vehicles equipped with Meritor steer axle drum brakes with a front axle rating less than 13,300 lb (6038 kg) have experienced brake squealing noise when the service brakes are applied at lower speeds. NOTE: This is a nuisance noise issue and not a failure. The solution given in this service bulletin may fix this issue.
CALFTL54-0102020-06-26. Service bulletin. SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:ABS WARNING LIGHT; SERVICE BRAKES, AIR:ANTILOCK:ABS WARNING LIGHT. Customer Advisory Letter for New Cascadia ABS Warning Light Illumination work instructions. Due to the enhanced vigilance of the New Cascadia ABS controller, some fault codes and indicator lights do not necessarily require immediate maintenance attention. DTNA and WABCO are currently jointly working on a long-term corrective plan for the condition.
CALFTL42-0022020-06-26. Service bulletin. SERVICE BRAKES, AIR; SERVICE BRAKES, HYDRAULIC. Customer Advisory Letter for Antilock Brake System (ABS) Modulator Valve Replacement work instructions.

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