2021 Mack LR TSBs

Inactive Code P25AE00 Being Generated After A Hard Pull And A Momentary Drop In Engine Oil Pressure (Low Oil Pressure)...

Vehicles may present with oil leak coming from the clutch/flywheel housing and observation of burned clutch smell or clutch slipping.

CBR: Automated Manual Transmission (AMT) Model D or F (mDrive and I-Shift, AMT-D, AMT-F) - Transmission Oil Leakage From...

CBR: 11L, 13L, And 16L Engine Oil Analysis Specifications - US10 And Newer Emissions

CBR: Vehicles built with an 11 liter engine may experience a complaint of excessive fuel in the oil.

CBR: Turbo Compound (TC) Hot Side Noise, Diagnostic Information.

CBR: Vehicles built with an 11 liter engine may experience a complaint of excessive fuel in the oil.

CBR: For vehicles equipped with an 11L engine, the plastic saddle bracket holding the a/c line on the left side of the...

Barksdale Leveling Valve, Leak Test

CBR: Programming Failure - Chassis With Cummins Engine And An Allison Transmission

CBR: Mack DEF Dosing Valve Diagnostic Trouble Codes (DTC) P202D00, P208E00, P103B00 - US10+OBD13 And Newer Emissions

Engine Control Module (EMS) Software (MSW) Information - Improvement List, Through June 2023 - US21+OBD2020 Emissions

CBR: Model Year 2017 to Current - Fuel Filter Change ( Primary And Secondary ) For The EM - USA17 Emission Engines

CBR: Mack Chassis - Allison Reduced Engine Load At A Stop (RELS) Diagnostic Trouble Code P071a Or P07ce - GR,TE,LR...

CBR: 11L Engines, Non-Common Rail - Air Compressor Coolant Pipe, Parts Substitution - US14+OBD13 To US14+OBD16

Engine Control Module (EMS) Software Information - Improvement List (Change Log), March 2023 US21+OBD2021 Emissions...

Engine Control Module (EMS) Software (MSW) Information October 2022; Improvement List (Change Log) - US21+OBD22 (13L...

Programming Failure - Chassis With Cummins Engine And An Allison Transmission

11L, 13L, And 16L Engine Oil Analysis Specifications - US10 And Newer Emissions

(Back Office Only) - Engine Brake Vibration When In High Setting - 13L Engine With Variable Geometry Turbo ( VGT ) -...

US10 Emission Engines - Diagnostic Trouble Code ( DTC ) SPN 1231 FMI 9 Troubleshooting.

Vehicles Equipped With An Automated Manual Transmission Model D or F ( AMT-D, AMT-F ) - Transmission Oil Leakage From...

Emcon (Spark Assist) Engine Aftertreatment System Troubleshooting Check Sheet - US07 Emissions

Manual Compression Test Adapter For Engines With Stainless Steel Injector Sleeves (Conical Tip Injectors) - US07 And...

Mack Low Oil Pressure Diagnostic Process For 11 Liter Engines

Mack Chassis - Diagnostic Trouble Codes ( DTC's ) - P020113, P020213, P020313, P020413, P020513, P020613, Cylinders 1...

Mack Chassis - Engine Fan Override Information For Model LR

Mack Chassis - Equipped With An Automated Manual Transmission Model D or F (mDrive, AMT-D, AMT-F) - Transmission Oil...

Engine Oil Analysis Specifications - US10 And Newer Emissions

TC Engine Turbochargers

Variable Geometry Turbocharger ( VGT ) Function Test ( 2551-08-03-02 ), OBD13 Model Year ( MY ) 2014 And Newer

Engine Control Module (EMS) Software (MSW) Information - Improvement List, November 2021 - US21+OBD2020 Emissions

(Back Office Only) Vehicles Equipped With A Turbo Compound Engine - Report Of Frequent Air Compressor Cycling.

Trucks Equipped With A Cummins Engine - Engine Preheat Icon Does Not Illuminate In The Instrument Cluster (IC) During...

Automated Manual Transmission( AMT ) ( I-Shift, mDRIVE ) Equipped Chassis, OBD13 And Newer - Light Turbo Surge ( Chuff )...

11 Liter Engines - Fuel In Oil - Vehicles Built Between October 2020 And June 2021

Diagnostic Trouble Codes (DTC) For The Engine Pre-Heat Relay: Supplementary Instructions

Diagnostic Trouble Codes (DTC) For The Engine Pre-Heat Relay: Supplementary Instructions - US10+OBD13 And Newer...

CBR - Mack DEF Level (UQLS) Sensor Troubleshooting Guide - US17+OBD16 Emissions to US22+OBD2023 (DOES NOT APPLY TO AN(4)...

CBR - Mack Temperature Sensor Troubleshooting Guide

CBR - When an OTA (Over-The-Air) job starts to program the VECU blocks the starter relay out, if the job ends in a...

Mack DEF Level (UQLS) Sensor Troubleshooting Guide - US17+OBD16 Emissions and Newer

CBR: US17 GHG Common Rail Fuel System Component Electrical Faults - Model Year 2017 To 2024

CBR: Diagnostic Trouble Code (DTC) U010187- Lost Communication With TECU

Aftertreatment Diesel Exhaust Fluid (DEF) Tank, Level Sensor, Replacement

Diagnostic Trouble Code (DTC) P103200: Particulate Matter Sensor Removed from Exhaust - US21+OBD22 Emissions

Mack NOx Sensor Troubleshooting Guide - US10+OBD13 And Newer Emissions

Mack NOx Sensor Troubleshooting Guide - US10+OBD13 And Newer Emissions

CBR: Diagnostic Trouble Code (DTC) P225C00 : NOx1 Sensor Stuck High - US17+OBD2019 And Newer Emissions

Mack MMD Alternator Pulley

DEF Level (UQLS) Sensor Troubleshooting Guide - US17+OBD16 Emissions and Newer.

NOx Sensor Troubleshooting Guide - US10+OBD13 And Newer Emissions.

(Back Office) - Cruise Control Inoperative After Updating Software VECU5 Without ESP Package (UESP).

No Start Condition After Over The Air Programing - VECU5 No Start "Safe State"

Temperature Sensor Troubleshooting Guide - US10+OBD13 And Newer

Low Voltage Disconnect (LVD), Function Description

NOx Sensor Troubleshooting Guide - US10+OBD13 And Newer Emissions

DEF Level (UQLS) Sensor Troubleshooting Guide - US17+OBD16 Emissions and Newer

Aftertreatment Control Module ( ACM ) Diagnostic Trouble Codes ( DTC ) U0001-88 and U0010-88 Lighting The Malfunction...

DEF Level (UQLS) Sensor Troubleshooting Guide - US17+OBD16 Emissions and Newer

EPRV Delete & Fuel Rail Pressure Sensor Update

Exhaust Gas Temperature Sensor Circuit Range/Performance

Mack Chassis - Particulate Matter (PM) Sensor Diagnostic Trouble Codes (DTC) Illuminating The Malfunction Indicator Lamp...

Aftertreatment Control Module (ACM) Offline/Not Visible/Missing From Control Unit Information in Premium Tech Tool (PTT)...

VECU Software Update

VECU Active code and no MIL Lights

Particulate Matter (PM) Sensor Diagnostic Trouble Codes (DTC) Illuminating The Malfunction Indicator Lamp (MIL) -...

Front Accessory Drive Noise, Alternator Belt Wear, Alternator Belt Tensioner Failure - Model Year 2017 And Newer

Vehicles Equipped With a Common Rail Fuel System - Aftermarket Secondary Fuel Filters, Important Information On Approved...

If oil dilution is suspected refer to the applicable CBR solution below: CBR-659Mack Chassis - Oil Diluted With Fuel;...

CBR: Overhead Wear Overview - Model Year2018 To Current (Common Rail Fuel System ONLY)

CBR: Intermittent Diagnostic Trouble Codes U02A3,U029D, U029E - USE FOR NEW VEHICLES (US21+OBD22 Emissions)

CBR - Mack Selective Catalytic Reduction (SCR) Muffler Troubleshooting Guide - US10+OBD13 And Newer Emissions

Mack DEF Pump Troubleshooting Guide - US10+OBD13 And Newer Emissions

Diagnostic Trouble Codes (DTC) P208064, P208464, P242B64 and P246F64 Lighting The Malfunction Indicator Lamp (MIL) -...

Mack DEF Pump Troubleshooting Guide - US10+OBD13 And Newer Emissions

USE FOR NEW VEHICLES (US21+OBD22 Emissions) - Intermittent Diagnostic Trouble Codes U02A3, U029D, U029E

fuel in the oil inspection

Aftertreatment Hydrocarbon Injector (AHI) Troubleshooting Guide - US10+OBD13 And Newer Emissions.

Selective Catalytic Reduction (SCR) Muffler Troubleshooting Guide - US10+OBD13 And Newer Emissions.

DEF Pump Troubleshooting Guide - US10+OBD13 And Newer Emissions.

Premium Tech Tool (PTT) - Message For Data Mismatch, Product Configuration Mismatch; Instruction To Run An Accessory Kit...

DEF Pump Troubleshooting Guide - US10+OBD13 And Newer Emissions

Selective Catalytic Reduction (SCR) Muffler Troubleshooting Guide - US10+OBD13 And Newer Emissions

Aftertreatment Hydrocarbon Injector (AHI) Troubleshooting Guide - US10+OBD13 And Newer Emissions

USE FOR NEW VEHICLES (US21+OBD22 Emissions) - Intermittent Diagnostic Trouble Codes U02A3, U029D, U029E

Mack Chassis -Oil Diluted With Fuel; Fuel In Oil, Diagnostic Information - All Emissions Prior To US17+OBD16 (Common...

Mack Chassis - Diesel Exhaust Fluid ( DEF ) System Cleaning/Flush After DEF Pump Failure Or System Contamination

Diagnostic Trouble Code ( DTC ) P26E8 Intermittently Lighting The Malfunction Indicator Lamp ( MIL ); Possible Derate...

Dye Test Procedure; Fuel System Leak Check - Common Rail Fuel System - US17+OBD16 And Newer Emissions, Common Model Year...

Diagnostic Trouble Codes (DTC) P24F600 Or P24F700 - US14+OBD15 Emissions And Newer, Model Year 2016 And Newer

Dye Test Procedure; Fuel System Leak Check - Common Rail Fuel System - US17+OBD16 And Newer Emissions, Common Model Year...

Volvo Chassis - Diagnostic Trouble Code (DTC) SA 0 FMI 0 or SPN 0 FMI 0 Present On Fault Code Readout - US10 And Newer...

Mack Chassis - Where To Find The Body Builder Portal - Body Builder Manual ( BBM ) Information - US04 And Newer...

Premium Tech Tool (PTT) Error Code 43: Service Regeneration Fails To Start; Service Regen Does Not Complete With Error...

Diesel Fuel Information - Acceptable Biodiesel, Fuel Blend For Summer And Winter - US07 And Newer Emissions, Model Year...

Air In The Fuel System Tests, Common Rail Fuel System - US17+OBD16 and Newer Emissions

Diagnostic Trouble Codes (DTC) P208064, P208464, P242B64 and P246F64 Lighting The Malfunction Indicator Lamp (MIL) -...

CBR - Mack Chassis - Through Shaft Bearing Retainer Breakage On Mack Carriers.

CBR - Mack Carrier Nut Adhesive Change.

CBR - No Start Condition After Over the Air Programing.

CBR - To correct the MID136 SID 66 FMI 7 fault code the latest Bendix VCP file will need to downloaded.

CBR - A significant GPS reporting issue is affecting fleet operations, with trucks maintaining back-office communication...

CBR: To correct the MID136 SID 66 FMI 7 fault code the latest Bendix VCP fi le will need to be downloaded.

CBR: Telematics Gateway (TGW) Connect Ability Issues

CBR -Telematics Gateway (TGW) Connect Ability Issues

CBR: TGW Will Not Connect After SIM Card Replacement

Mack Trucks now offer an improved HD Inter-Axle Through Shaft for the CRD 125, 150, 180, and 200 family carriers.

CBR: Diagnostic Trouble Code (DTC) P215A-64, Fault Code SPN 84 FMI 19

Mack Model TE,LR - Frame Over Height

Back Office Mack Chassis - Secondary Gauge Set Up - Model Year 2018 and Newer.

Premium Tech Tool ( PTT ) Training Materials And Support Tools

DEF Pump Cycling periodically Hours After Key Off

Mack - PTO Pump Speed Calculator

(Back Office Only) Mack Chassis - Cruise Control Inoperative After Disabling The Electronic Stability Program (ESP)

Mack Chassis - Air System Schematics For Models - MRU, LEU And ( LR ) Using The Same Schematic As the LEU

Mack Chassis - Equipped With Bendix Fusion, With Or Without Lane Departure Warning ( LDWS ) - Diagnostic Trouble Code (...

Mack Chassis - FSB 563-008 Plugs, Pressure Protection Manifold - New Brass Plugs For Noregon Pressure Protection...

Improved method for determining which DTC to troubleshoot in a MIL on situation

Back of Cab Crack, Repair

Modify Air Dryer TCOV

CBR - Mack Chassis - Timing Gear Plate Repair

CBR: Equipped With An Automated Manual Transmission Model D or F ( AMT-D, AMT-F, mDrive) Missing X1 Value In VDA And...

CBR - Automated Manual Transmission ( AMT ) Flywheel Pilot Bearing Wear On Input Shaft.

CBR: Automated Manual Transmission ( AMT ) -Transmission Electronic Control Unit ( TECU ) MID130 PSID 29 FMI 7 /P10AE81...

CBR: Automated Manual Transmission (AMT) Transmission Kickdown Mode

CBR: Timing Gear Plate Repair.

Timing Gear Plate Inspection

Warranty Automated Manual Transmission ( AMT, I-Shift, mDrive ) Control Housing Assembly; Guidelines For Filing A Claim...

Automated Manual Transmission ( AMT ) I-Shift / mDRIVE - Ribbon Harness Replacement - Speed Sensor Bolts, Possible Fault...

Mack Chassis - Vehicles Equipped With An Automated Manual Transmission Model F ( AMT-F, mDrive ), Premium Tech Tool (...

Mack Chassis - Automated Manual Transmission Model F ( AMT-F, mDrive ) - Short Transmission Replacement; Calibration...

Automated Manual Transmission (AMT) (Spigot Bearing) Input Shaft Repair Kit And Shim Kit, Part Number Information,...

Mack Chassis - Equipped With An Automated Manual Transmission (mDrive, AMT) AMT-C, AMT-D Or AMT-F - Transmission Oil...

Automated Manual Transmission Gearbox Will Not Shift To High Range After Gearbox Repair; MID 130 PSID 24 FMI 1, P1072-92...

Frame lean can be caused by several seemingly isolated possibilities.

CBR - Driveline Noise, Suspension Ride Height Too High, Suspension Will Not Exhaust - Chassis Built 2016w01 And Newer.

Vehicles Equipped With Chalmers Suspension - Frame Bracket Hardware Loose or Interfering

Hub Cap, Leaking

New TSB- Hub cap leaking

Electronically Controlled Suspension (ECS) Losing Air Pressure

Mack Chassis - Front Hub With Unit-Bearings ( Unitized Wheel Bearings ), Inspection Information And Guidelines -...

CBR - Active "Set Park Brake" Message On Drivers Information Display (DID).

CBR: SNM 20-005 - HD Disc Brake Rotor Upgrade

Mack Chassis - P05E662 Park brake Sensor/Switch Circuit Range/Performance, Signal Compare failure - Diagnostic...

Bump Stop Interference with Brake Slack

Disc Brake Rotor, Replacement

CBR: Vehicle Overspeed Warning Comes Active At A Lower Speed Than Expected; Vehicle Overspeed Warning In Driver...

Infotainment System - Volume Drop During A Phone Call, Phone Connected Via Bluetooth

Vehicle Overspeed Warning Comes Active At A Lower Speed Than Expected; Vehicle Overspeed Warning In Driver Information...

Noise On The AM Radio Band; Thumping, Ticking, Fluttering Sound On AM Radio Band - Model Year 2018 And Newer

Volvo Chassis - Certain Volvo Trucks Built After January 11, 2016 May Experience an Issue with the Instrument Cluster...

CBR - Accelerator Pedal: Inspection Instructions

Service Literature Published and Released in May, 2023

Mack Dealer Support Communication - Selecting The Proper SR Area For Creating An eService

Remote Control Central Door Lock, Programming; Key Fob Cannot Be Programmed Or Does Not Work After Programming - Model...

Incorrect Data on Door Label Set

CBR: The procedure to eliminate the Mack Chassis "Air Restriction Light On" seen in the cluster is to confirm that the...

TSB-Charge Air Cooler t-clamp install.

Mack Chassis - Bendix Vendor Configuration Program ( VCP ) Software Download Information

Remote Software Downloads

CBR - Hard Steering Due to Steering Column Miter Box Corrosion Inspection and Replacement Procedure

Mack Chassis - SNM15-027 A/C Compressor Inspection Required For Warranty Repairs