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Service bulletins for the 2023 Mack Anthem

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.

149 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
CBR-206 2023102023-11-03. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. CBR: Vehicle Speed Factor (K-Factor) Programming - Speed Factor Value Incorrect When Calculated In Premium Tech Tool (PTT); Speedometer Reading Incorrectly Following A Change To Vehicle Speed Factor - US17+OBD16 And Newer Emissions, Common Model Year 2018.
M-258-014 2023092023-10-03. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL; ENGINE AND ENGINE COOLING. TSB: Aftertreatment Diesel Exhaust Fluid (DEF) Tank, Level Sensor, Replacement
S3600 2023092023-10-03. Service bulletin. ENGINE AND ENGINE COOLING; ENGINE AND ENGINE COOLING:COOLING SYSTEM:HOSES/LINES/PIPING/FITTINGS. Service Campaign: Upper Radiator Hose Replacement (4.00 Degree Crank Angle)
S3586 2023092023-10-03. Service bulletin. ENGINE AND ENGINE COOLING; ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY. Service Campaign: Upper Radiator Hose Replacement (2.25 Crank Angle)
S3102 2023092023-10-03. Service bulletin. ENGINE AND ENGINE COOLING; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE. Fleet Campaign: CNG Exhaust Pipe Modification
M-141-001 2023082023-09-06. Service bulletin. ENGINE AND ENGINE COOLING. TSB: Air Restriction Indicator
CBR-2131 2023082023-09-06. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. CBR: Intermittent Diagnostic Trouble Codes U02A3,U029D, U029E - USE FOR NEW VEHICLES (US21+OBD22 Emissions)
CBR-2112 2023072023-08-02. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN; ENGINE AND ENGINE COOLING. CBR: Programming Failure - Chassis With Cummins Engine And An Allison Transmission
CBR-2303 2023072023-08-02. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ENGINE AND ENGINE COOLING. CBR: Mack DEF Dosing Valve Diagnostic Trouble Codes (DTC) P202D00, P208E00, P103B00 - US10+OBD13 And Newer Emissions
KC-22892023-07-06. Service bulletin. ENGINE AND ENGINE COOLING. Diagnostic Trouble Code (DTC) P103200: Particulate Matter Sensor Removed from Exhaust - US21+OBD22 Emissions
KC-2043 Rev 42023-07-06. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM); ELECTRICAL SYSTEM. Engine Control Module (EMS) Software (MSW) Information - Improvement List, Through June 2023 - US21+OBD2020 Emissions
S32362023-07-06. Service bulletin. ENGINE AND ENGINE COOLING. Campaign - On certain Mack truck models built with a MP8 engines, there were some inconsistencies with the engine valve and injector adjustments.
KC-2116 Rev 92023-07-06. Service bulletin. ENGINE AND ENGINE COOLING. Mack NOx Sensor Troubleshooting Guide - US10+OBD13 And Newer Emissions
KC-2116 Rev 82023-07-06. Service bulletin. ENGINE AND ENGINE COOLING. Mack NOx Sensor Troubleshooting Guide - US10+OBD13 And Newer Emissions
KC-2158 Rev 62023-07-06. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. CBR - Mack Selective Catalytic Reduction (SCR) Muffler Troubleshooting Guide - US10+OBD13 And Newer Emissions
KC-20502023-06-05. Service bulletin. ENGINE AND ENGINE COOLING. CBR: Diagnostic Trouble Code (DTC) P225C00 : NOx1 Sensor Stuck High - US17+OBD2019 And Newer Emissions
KC-2263-Ver52023-06-05. Service bulletin. ENGINE AND ENGINE COOLING. CBR: Timing Gear Plate Repair. This solution provides supplementary information to be used when installing a Timing Gear Plate with Integrated Seal.
KC-22722023-05-03. Service bulletin. ENGINE AND ENGINE COOLING. CBR: Diagnostic Trouble Code (DTC) P008A - Low Pressure Fuel System Pressure - Too Low
M-220-0012023-04-04. Service bulletin. ENGINE AND ENGINE COOLING. New TSB for oil galley plug leaking.
S76272023-03-07. Service bulletin. ENGINE AND ENGINE COOLING. Mack MMD Alternator Pulley
KC-22142023-01-07. Service bulletin. ENGINE AND ENGINE COOLING. Turbo Compound 2nd Generation - EGR And/Or DPF Diagnostic Trouble Codes (DTC), Diagnostic And Repair Information
M-212-0012023-01-04. Service bulletin. ENGINE AND ENGINE COOLING. Timing Gear Plate Inspection
KC-22142022-11-03. Service bulletin. ENGINE AND ENGINE COOLING. Turbo Compound 2nd Generation - EGR And/Or DPF Diagnostic Trouble Codes (DTC), Diagnostic And Repair Information
KC-21652022-11-03. Service bulletin. ENGINE AND ENGINE COOLING; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. Mack DEF Pump Troubleshooting Guide - US10+OBD13 And Newer Emissions
M-265-0022022-10-06. Service bulletin. ENGINE AND ENGINE COOLING. TSB-Charge Air Cooler t-clamp install.

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