2023 Mack MD Recall: Engine control module (ECM) may experience an internal short-circuit…
NHTSA campaign 22V606000 · Engine and Engine Cooling · filed Aug 9, 2022 · verified Jul 30, 2026
The defect
Mack Trucks, Inc. (Mack) is recalling certain 2023 MD6/7 trucks. The engine control module (ECM) may experience an internal short-circuit, which can result in an unexpected engine shut down.
The risk
An unexpected engine shut down can increase the risk of a crash.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →The fix — 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.
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.
Affected vehicles
Related recalls
More Mack MD recalls
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- 2026 Mack MD — Center bench seat belt assembly may be routed incorrectly
- 2024–2025 Mack MD and 1 other model — Gross Axle Weight Rating (GAWR) listed on the vehicle…
- 2024 Mack MD — Park brake light may indicate the incorrect brake status…
- 2024 Mack MD — Steering wheel attachment bolt may loosen and separate from…
Other campaigns involving Mack vehicles
Source: NHTSA recall database, campaign 22V606000 (manufacturer number SC0438). Data last verified Jul 30, 2026.