- PACCAR DEF Inducement Software Update aligns with revised EPA guidance.
- Updated software extends compliance timelines for eligible trucks.
On July 7, PACCAR announced that Peterbilt Motors Company and Kenworth Truck Company will introduce updated software for trucks powered by PACCAR MX-11 and PACCAR MX-13 engines. The revisions are intended to comply with updated guidance issued by the United States Environmental Protection Agency (EPA) regarding Diesel Exhaust Fluid (DEF) inducement strategies. Trucks manufactured after July 20 will receive the software during production, while eligible vehicles built after 2018 can receive the update through Peterbilt and Kenworth dealerships.
Key Software Changes Introduced Under EPA Guidance
Under the revised EPA guidance, the software introduces two significant changes to the DEF inducement process. The maximum vehicle speed during the final inducement stage increases from 5 mph to 25 mph. Additionally, the timeframe before reaching the final inducement speed limit for component-related or DEF fluid-quality issues is extended substantially from 4 hours to 160 hours. These revisions are intended to align vehicle operation with the latest regulatory guidance while maintaining emissions system compliance.
Updated DEF Inducement Parameters
| Parameter | Previous Setting | Updated Setting |
|---|---|---|
| Final inducement speed limit | 5 mph | 25 mph |
| Timeline before final inducement | 4 hours | 160 hours |
How DEF Inducements Support Emissions Compliance
Diesel Exhaust Fluid inducements are built-in safeguards that automatically reduce a truck's speed and engine power when the emissions control system detects a malfunction. These measures encourage operators to resolve the issue by refilling the DEF tank, repairing defective sensors, or completing a system regeneration. By prompting corrective action, the inducement strategy helps ensure continued compliance with emissions requirements while protecting the effectiveness of the aftertreatment system.
Frequently Asked Questions
What changes are included in PACCAR's updated DEF inducement software?
The updated software aligns PACCAR trucks with revised U.S. EPA guidance governing Diesel Exhaust Fluid inducements. It raises the final inducement speed limit from 5 mph to 25 mph and extends the allowable time before reaching the final inducement stage from 4 hours to 160 hours for component-related or fluid-quality issues. Factory installation begins on trucks manufactured after July 20, while eligible trucks built after 2018 can receive the update through Peterbilt and Kenworth dealerships.
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