Mack Trucks, Inc. (Mack) is recalling certain 2023 LR Battery Electric trucks. During certain driving maneuvers, the power steering system may lose pressure, causing a loss of power steering assist.
Risk and remedy
Risk
Loss of power steering assist increases the risk of a crash.
Remedy
Dealers replace the higher ratio steering gear and power steering pump software for higher RPM's on the steering pump, free of charge. Owner notification letters were mailed on May 24, 2022. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0434.
Technical service bulletins and other communications the manufacturer sent dealers about this vehicle. Ask a dealer for the full document by its number.
10253818CBR: Battery Electric Vehicle (BEV) DTC P108664 - Charging Switch Unit B, Voltage Supply, Signal Plausibility Failure
10215305DEF Pump Troubleshooting Guide - US10+OBD13 And Newer Emissions.
10215296Vehicle Overspeed Warning Comes Active At A Lower Speed Than Expected; Vehicle Overspeed Warning In Driver Information Display (DID) - Model Year 2018 And Newer With New Style Instrument Cluster.
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.
1021529411L, 13L, And 16L Engine Oil Analysis Specifications - US10 And Newer Emissions
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,
10215290(Back Office Only) - Engine Brake Vibration When In High Setting - 13L Engine With Variable Geometry Turbo ( VGT ) - US17 And Newer Emissions (Common Rail Fuel System).
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
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.