Engine control module calibrated incorrectly
Defect Summary
Daimler trucks north america, llc (dtna) is recalling certain 2019-2021 thomas built buses saf-t-liner c2 school buses equipped with cummins b6.7n engines. the engine control module software may be calibrated incorrectly, causing the engine to not limit engine speed or torque as intended for certain safety-related functions such as vehicle braking, traction and stability control, speed control, or collision avoidance.
Safety Consequence
If safety-related functions such as vehicle braking, stability, speed, and collision avoidance do not function properly, it can increase the risk of a crash.
Corrective Action
Dtna will work with the engine manufacturer cummins inc. To notify owners, and cummins dealers will recalibrate the engine control module, free of charge. owner notifications were mailed on march 29, 2021. owners may contact dtna customer service at 1-800-547-0712. dtna number for this recall is fl-879.
Similar Recalls
Other recalls from Daimler Trucks North America, Llc or involving N/A.
FAQ: Recall 21V120000
Your rights, the repair process, and what each field on this page means.
What is recall 21V120000?
NHTSA recall 21V120000 was issued by Daimler Trucks North America, Llc on February 25, 2021. It addresses: Engine control module calibrated incorrectly. The recall affects approximately 159 vehicles, with the defect involving the N/A component.
How do I get this recall repaired?
Contact any authorized Daimler Trucks North America, Llc dealer and reference NHTSA recall ID 21V120000 or the manufacturer campaign number FL-879. Under federal law, the repair is completely free regardless of vehicle age or owner history.
Is my vehicle included in this recall?
The only way to confirm is to look up your 17-character VIN at nhtsa.gov/recalls. NHTSA's tool will tell you if VIN-by-VIN this exact recall applies.
How long do I have to get a recall repair done?
There is no expiration on most federal safety recalls. Even if your vehicle is years old and you bought it used, the manufacturer is required to perform the repair at no cost.
Where does the data on this page come from?
All information on this page is sourced directly from the U.S. Department of Transportation public dataset for NHTSA recalls. Last refreshed: 2026-05-22. For the most current official notice, visit nhtsa.gov/recalls.