Mack · United States · Mod
Mack MD: Engine and engine cooling — engine control module (ecu/ecm)
Affects Mack MD · 2023 — about 150 vehicles.
The hazard
An unexpected engine shut down can increase the risk of a crash.
What to do
Cummins will replace the ECM, free of charge. Owner notification letters were mailed on September 27, 2022. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0438.
Critical — crash/injury risk now
High — injury risk; see remedy
Moderate — fix at next service
Low — minor / informational