Cummins Continues to Support Customers with Updated DEF Inducement Calibrations
COLUMBUS, IND. — Cummins says it is continuing to roll out updated diesel exhaust fluid (DEF) inducement calibrations in line with EPA guidance issued in August 2025. The updates give operators more time to address certain DEF and selective catalytic reduction issues before engine power or speed reductions occur, aiming to reduce unnecessary downtime for on-highway and non-road equipment while keeping emissions compliance in place. Tens of thousands of engines have already received the updates. Cummins notes DEF remains required for proper emissions system operation and directs customers to local distributors or dealers for available updates.
About Cummins
Cummins Inc. is a global power company headquartered in Columbus, Indiana, with five segments including Engine, Components, Distribution, Power Systems and Accelera. Its portfolio includes diesel, electric and hybrid powertrains, aftertreatment, turbochargers, fuel systems and zero-emissions technologies. It employs about 67,400 people and earned $2.8 billion on $33.7 billion in sales in 2025.
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