2010–2015 Mack Leu, 2011–2015 Mack Mru, 2014–2015 Mack Pinnacle (cxu) Recall: Condensation in the intake manifold may freeze during cold weather…
NHTSA campaign 14V137000 · Engine and Engine Cooling · filed Mar 24, 2014 · verified Jul 30, 2026
The defect
Mack Trucks Inc. (Mack) is recalling certain model year 2014-2015 CXU, 2010-2015 LEU, and 2011-2015 MRU vehicles manufactured with certain Cummins Westport Model ISL G and ISX12 G engines. Condensation in the intake manifold may freeze during cold weather conditions and interfere with the proper operation of the intake manifold pressure sensor.
The risk
The improper operation of the sensor could induce elevated exhaust temperatures or flames from the exhaust pipe, increasing the risk of a vehicle fire or burn injury to a person near the exhaust pipe.
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 and Cummins Westport will notify owners, and authorized Cummins service facilities will upload a new ECM calibration, free of charge. The recall began on March 12, 2014. Customers may contact Mack at 1-336-393-2000 or Cummins Inc. at 1-800-343-7357. Mack's number for this recall is SC0377.
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.safercar.gov.
Affected vehicles
Related recalls
More Mack Leu recalls
- 2011–2016 Mack Leu and 2 other models — Excessive engine crankcase pressures may cause the…
- 2015 Mack Leu — In the affected vehicles, a component of the door opening…
- 2016 Mack Cxu and 2 other models — Affected actuators may have an incomplete attachment of the…
- 2010–2014 Mack Chu and 10 other models — Hazard warning lights may fail
- 2010–2015 Mack Leu — In the affected vehicles, the exhaust pipe may disconnect…
Other campaigns involving Mack vehicles
Source: NHTSA recall database, campaign 14V137000 (manufacturer number SC0377). Data last verified Jul 30, 2026.