2011 Mack CXU612

Owner complaints

What owners report most

1. Structure1
2. Suspension1

Latest complaints

• Nov 6, 2011AR23,970 mi
  Structure › Frame and members › Underbody shields · Suspension
  I am a maintenance mechanic for a large trucking firm. On 4 oct 2011, I checked the torque on the 5TH wheel bolts of unit 11054 because I could see that the 5TH wheel was sliding on the frame. The bolts were defective - yielding prior to reaching the recommended torque of 236 ft.lb. I adjusted the…

  I am a maintenance mechanic for a large trucking firm. On 4 oct 2011, I checked the torque on the 5TH wheel bolts of unit 11054 because I could see that the 5TH wheel was sliding on the frame. The bolts were defective - yielding prior to reaching the recommended torque of 236 ft.lb. I adjusted the torque wrench to 200 ft.lb., its lowest setting, and could not get any of the bolts to hold. I replaced all ten bolts with 5/8" grade 8 hardware instead of the factory 16MM 10.9 metric because that was all we had available. There was no interference between the 5TH wheel bolts and the huck rivets on the frame rail. The bolts were weak. *tr

Service bulletins

Technical service bulletins and other communications the manufacturer sent dealers about this vehicle. Ask a dealer for the full document by its number.

• 10251333CBR -Telematics Gateway (TGW) Connect Ability Issues
• 10251331CBR - Active "Set Park Brake" Message On Drivers Information Display (DID).
• 10251329CBR - Automated Manual Transmission ( AMT ) Flywheel Pilot Bearing Wear On Input Shaft.
• 10246086TSB: Mack Trucks now offer an improved HD Inter-Axle Through Shaft for the CRD 125, 150, 180, and 200 family carriers. The new HD shaft went into production on January 23rd, 2023 for 2.54 - 3.50 axle ratios and April 1st, 2023 for 3.56 - 3.98 ratios. The new HD through shaft is an upgrade over the current standard shaft and can now be used as a replacement part instead of the standard shaft. The new HD shaft has a new design to increase strength, longevity and life over the standard shaft.
• 10241946TSB: Barksdale Leveling Valve, Leak Test
• 10241945TSB: Air Restriction Indicator
• 10237374Service Literature Published and Released in May, 2023
• 10237342CBR: Diagnostic Trouble Code (DTC) P215A-64, Fault Code SPN 84 FMI 19
• 10237339CBR: eWarranty To UCHP Labor Code ( SCC Code ) Crossover, Conversion Information For Use With Campaigns ( FI, PI ) And Recalls ( EC, SC ), Location On Trucks Dealer Portal ( TDP )
• 10222608TSB-Charge Air Cooler t-clamp install.
• 10215315Programming Failure - Chassis With Cummins Engine And An Allison Transmission
• 10215314NOx Sensor Troubleshooting Guide - US10+OBD13 And Newer Emissions.
• 10215312(Back Office) - Cruise Control Inoperative After Updating Software VECU5 Without ESP Package (UESP).
• 10215307Selective Catalytic Reduction (SCR) Muffler Troubleshooting Guide - US10+OBD13 And Newer Emissions.
• 10215305DEF Pump Troubleshooting Guide - US10+OBD13 And Newer Emissions.
• 10215295Warranty Automated Manual Transmission ( AMT, I-Shift, mDrive ) Control Housing Assembly; Guidelines For Filing A Claim For Chassis Return Visit With Transmission Issues After A Repair Requiring Control Housing Removal And Reinstallation - US07 And N.
• 10215291Premium Tech Tool (PTT) - Message For Data Mismatch, Product Configuration Mismatch; Instruction To Run An Accessory Kit Displayed When Attempting To Run Diagnostics For Diagnostic Trouble Codes (DTC) Or Programming - US10+OBD13 And Newer Emissions,
• 10215289Automated Manual Transmission ( AMT ) I-Shift / mDRIVE - Ribbon Harness Replacement - Speed Sensor Bolts, Possible Fault Codes P1058 - 21 Or MID 130 PID 161 FMI 1
• 10215287US10 Emission Engines - Diagnostic Trouble Code ( DTC ) SPN 1231 FMI 9 Troubleshooting.
• 10215286Vehicles Equipped With An Automated Manual Transmission Model D or F ( AMT-D, AMT-F ) - Transmission Oil Leakage From Transmission Input Shaft Seal Or Output Shaft Seal - US10 And Newer Emissions, Common Model Years 2010 And Newer.
• 10213658Emcon (Spark Assist) Engine Aftertreatment System Troubleshooting Check Sheet - US07 Emissions
• 10213652Low Oil Pressure Diagnostic Process For 11 Liter Engines
• 10213651Manual Compression Test Adapter For Engines With Stainless Steel Injector Sleeves (Conical Tip Injectors) - US07 And Newer Emissions, Model Year 2008 And Newer
• 10213646Sensor And Parameter Value Monitor - Template Parameter List For Pre-OBD (9-Pin Diagnostic Connector) Chassis In Premium Tech Tool ( PTT ); Regeneration And Road Test Sensor Monitor Parameters - US07 And US10 Emissions, Model Years 2008 To 2013
• 10213644Premium Tech Tool ( PTT ) Training Materials And Support Tools
• 10213642No Start Condition After Over The Air Programing - VECU5 No Start "Safe State"
• 10213641Temperature Sensor Troubleshooting Guide - US10+OBD13 And Newer
• 10213640Electronically Controlled Suspension (ECS) Losing Air Pressure
• 10213639Low Voltage Disconnect (LVD), Function Description
• 10213638DEF Pump Troubleshooting Guide - US10+OBD13 And Newer Emissions
• 10213637DEF Pump Cycling periodically Hours After Key Off
• 10213636Selective Catalytic Reduction (SCR) Muffler Troubleshooting Guide - US10+OBD13 And Newer Emissions
• 10213633USE FOR NEW VEHICLES (US21+OBD22 Emissions) - Intermittent Diagnostic Trouble Codes U02A3, U029D, U029E
• 10213632NOx Sensor Troubleshooting Guide - US10+OBD13 And Newer Emissions
• 10213630Mack Chassis - Vehicles Equipped With An Automated Manual Transmission Model F ( AMT-F, mDrive ), Premium Tech Tool ( PTT ) Gearbox Calibration Failure; Gearbox Calibration Operation Stops And Fails At 33% When Run With Transmission Removed
• 10213628Mack Chassis - Front Hub With Unit-Bearings ( Unitized Wheel Bearings ), Inspection Information And Guidelines - Commonly Model Year 2008 And Newer
• 10213626Mack Chassis - Equipped With An Automated Manual Transmission (AMT-D, mDrive) - Unable To Program Transmission Electronic Control Unit (TECU) That Comes With A Reman Transmission; Information For Programming TECUs For Different Emissions Levels - FSB
• 10213625Mack - PTO Pump Speed Calculator
• 10213612(Back Office Only) Mack Chassis - Cruise Control Inoperative After Disabling The Electronic Stability Program (ESP)
• 10213609Mack Chassis - Diesel Exhaust Fluid ( DEF ) System Cleaning/Flush After DEF Pump Failure Or System Contamination

Every Mack CXU612 model year

Bars are owner complaints, dots mark years with recalls. Select a year to open its report.