2020 Freightliner Business Class M2 Technical Service Bulletins

254 technical service bulletins (TSBs) are on record for the 2020 Freightliner Business Class M2. 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.

• 11005448Jul 17, 2024Engine. Customer Advisory Letter for Proactive Air Compressor, Resonator, and Suction Line Replacement
• 11005470Jul 1, 2024Transmission and drivetrain. Revised Technical Service Bulletin for Detroit New Final Drive Standard Performance Forward Carrier Change to Top Performance Passive Lube Management. Description of Revisions: The bulletin replaces the version dated 05/14/2024. Creation date has been updated.
• 11003924Jun 21, 2024Transmission and drivetrain. CX Advocate communication for clutch bolts
• 11003889Jun 21, 2024Engine. CX Advocate communication for NOx conversion low faults
• 11002436Jun 21, 2024Body and structure. Revised Field Service Campaign for Beverage Body Frame Rail 50 KSI. REVISION: 3 new SRTs and repair procedures have been created to address specific issues that arise during the repair.
• 11002435Jun 21, 2024Body and structure. Revised Field Service Campaign for Beverage Body Frame Rail 50 KSI. REVISION: 3 new SRTs and repair procedures have been created to address specific issues that arise during the repair.
• 11002434Jun 21, 2024Body and structure. Revised Important Campaign Inofrmation letter for SF671 - Bulletin Revision. REVISION: 3 new SRTs and repair procedures have been created to address specific issues that arise during the repair.
• 11000980May 29, 2024Transmission and drivetrain. Technical Service Bulletin for New Final Drive Over Heat Diagnostic
• 11000986May 24, 2024Suspension. Service Solution for Thread Spring Pin Suspension Alignment & Installation
• 11001976May 21, 2024Engine. Customer letter regarding variable speed water pump.
• 11001186May 21, 2024Electrical system. Field Service Campaign Owner Reminder Postcard large population
• 11001185May 21, 2024Electrical system. Field Service Campaign Owner Reminder Postcard small population
• 11000988May 15, 2024Engine. My Communications for SSI DEF Header Warranty Policy Extension for B6 7 Engines Model Years 2017-2021
• 11000976May 15, 2024Transmission and drivetrain. Technical Service Bulletin for Detroit New Final Drive Standard Performance Forward Carrier Change to Top Performance Passive Lube Management
• 10253878Apr 26, 2024Engine cooling. Extended Warranty Policy for certain Cummins B6.7 engines with SSI DEF headers for EPA and CARB Emissions Reporting
• 10253879Apr 25, 2024Engine cooling. Service Solution for DEF Pump Wiring for Cummins CM2450 Engine Controller
• 10252332Mar 8, 2024Body and structure. Important Campaign Information letter for SF671 Campaign Suspended
• 10251207Feb 21, 2024Body and structure. Revised Field Service Campaign for Beverage Body Frame Rail 50 KSI. REVISION: If you find modifications to the chassis, please submit a WSC Inquiry before beginning any additional work.
• 10251205Feb 21, 2024Body and structure. Important Campaign Information letter for SF671 - Bulletin Revision. REVISION: If you find modifications to the chassis, please submit a WSC Inquiry before beginning any additional work.
• 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
• 10249517Jan 19, 2024Body and structure. Field Service Campaign for Beverage Body Frame Rail 50 KSI
• 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
• 10238260Jun 2, 2023Equipment, Electrical system. Field Service Campaign for Common Telematics Platform Software Update
• 10233951Mar 31, 2023Steering. Important Campaign Information letter communicating that SF660 Field Service Campaign is Replaced by FL967.
• 10230910Jan 9, 2023Steering. Revised Field Service Campaign for Drag Link Tapered Joint
• 10228679Dec 14, 2022Steering. Field Service Campaign for Drag Link Tapered Joint
• 10216931Jul 28, 2022Electrical system. Revised Freightliner Service Bulletin for Replacing an Auto Baud Rate Detecting Bulkhead Module with a Fixed Baud Rate BHM. Description of Revisions: This bulletin replaces the version dated 02/01/2016. Information about auto baud rate connections has been included.
• 10214905Jun 1, 2022Engine cooling. Updated Freightliner Service Bulletin for Heater Hose Reduced Clearance May Cause Early Horn Failures
• 10208389Feb 15, 2022Engine cooling. Freightliner Service Bulletin for DEF Connector Reinforcement Caps.
• 10208381Feb 1, 2022Steering. Customer Advisory Letter for M2 Front Steer Arm – Drag Link Ball Joint Connection Inspection
• 10200698Aug 27, 2021Engine cooling. Service Solution for DD8 Engine Harness Chafing Air Compressor Suction Line.
• 10200642Aug 25, 2021Engine cooling, Equipment. Freightliner Service Bulletin for Heater Hose Clearance. Some Business Class M2 106 vehicles built from January 2017 through June 2021 may have a heater hose installed too close to the electric horn.
• 10198594Jun 3, 2021Transmission and drivetrain, Engine cooling. Freightliner Service Bulletin for Insulated Automatic Transmission Cover Plate. Some Business Class M2 and 108/114 Severe Duty vehicles equipped with a compressed natural gas (CNG) engine and automatic transmission may experience higher exhaust temperatures than vehicles equipped with a diesel engine.
• 10194886May 25, 2021Exterior lighting. Tech Talk Discussion Inoperative Driver's Side Headlight
• 10194879May 19, 2021Electrical system, Electronic stability control. Tech Talk Discussion M2. Rumble Strip Sound cuts out radio. On Guard. On Lane. Lane Departure. Audio interrupt switches
• 10194874May 13, 2021Exterior lighting. Tech Talk Discussion Turn Signals
• 10194482May 13, 2021Engine cooling. Freightliner Field Service Campaign for Freightliner M2 DD5 Fan Hub Fasteners. Fan hub bolts may be insufficiently torqued which could lead to a failure and excessive truck down time.
• 10194489May 7, 2021Engine cooling, Equipment. Service Solution for M2,108SD, 114SD Coolant Level Sensor P/N 06-93316-002. The Call Center has received several calls pertaining to this LCL sensor introduced to in 2018. The purpose of this solution is to bring better awareness to the sensor functions, fault codes generated, along with providing testing procedures used to validate the sensors condition. Additional information has been added.
• 10194476May 5, 2021Equipment, Suspension. Customer Advisory Letter for 80KSI Frame Reinforcement Installation on specific Business Class M2 equipped with 80KSI frame rails and an Airliner 20,000 lb or 21,000 lb rear suspension.
• 10191152Apr 30, 2021Electrical system. Updated Service Bulletin for upgrading BHM software for switch expansion module fault SPN 698 FMI 7. This bulletin replaces the version dated 11/11/2019. Figure 3 has been updated with a new hardware part number. A procedure was added to the data download process.
• 10190551Apr 19, 2021Engine cooling. 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 April 12, 2021.
• 10190549Apr 6, 2021Equipment. Warranty Information Letter announcing DTNA is adjusting the Standard Repair Times (SRTs) shown. The updated times will be applied to repair orders opened on or after April 5, 2021.
• 10189621Mar 31, 2021Transmission and drivetrain. Updated Freightliner Service Bulletin for Rerouting Wiring Harness to Reduce Chafing. This bulletin replaces the version dated 06/29/2020. Two new illustrations have been added to demonstrate proper application of butterfly tie straps on the transmission. ---Allison transmission wiring harness chafing causes disruption to gear engagement and fault code generation. To reduce chafing, the wiring is routed using stand…
• 10189340Mar 24, 2021Equipment. Updated Freightliner Service Bulletin for Espar Service Information. This bulletin replaces the version dated January 1, 2015. New Cascadia has been added to the model list.
• 10189319Mar 22, 2021Equipment, Electrical system. Warranty Policy Letter for battery tags. DTNA determined that since adopting the AutoMeter BCT-460DTNA Powernet Assessment Tool (AutoMeter) as the required powernet system tester, not all battery tags have to be retained support Warranty-related claims.
• 10189339Mar 19, 2021Suspension. Service Solution for M2 Rear Suspension Knock. This document applies to Freightliner M2 Business Class used in a “Fire/Emergency” application and equipped with FTL flat leaf spring rear suspensions. The FTL flat leaf spring rear suspension permits the spring pack to shift laterally within the spring hanger brackets. Under heavy cornering load applications, the spring pack can shift laterally and contact the…

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