All articles tagged with #def
The EPA proposes removing derates and limp-mode triggers tied to DEF failures for newly built diesel engines, aiming to cut costs and boost productivity while preserving about 90% of NOx reductions. If finalized, the rule would apply to 2027-model-year vehicles with a 45-day public comment period, and older trucks would still derate; the plan also eases warranty requirements and relies on warnings rather than immediate shutdowns.
The U.S. says it is prepared to restart strikes on Iran if a nuclear deal isn’t reached, with the Pentagon expanding munition production and President Trump seeking a strong agreement to prevent Iran’s nuclear capability as negotiators work to bridge gaps and a 60‑day truce extension is discussed.
The EPA indicates it will not deregulate DEF but encourages replacing unreliable urea quality sensors in diesel SCR systems with alternatives (such as NOx sensors) to verify DEF concentration. The agency notes that third parties can remove urea sensors if they install an effective replacement, though no emissions deletes are allowed. The move follows reports of high failure rates and ongoing cold-weather issues with DEF, and comes amid state-level interest in easing DEF requirements in harsh climates.
The EPA, led by Administrator Lee Zeldin, announced new guidance to remove Diesel Exhaust Fluid (DEF) sensors on diesel equipment and allow NOx-sensor-based software updates to monitor emissions. EPA says this will curb DEF-system failures that cause sudden speed reductions and outages, delivering about $13.79 billion in annual savings for Americans (including $4.4 billion for farmers) while keeping emissions standards intact. The move builds on February 2026 Right to Repair guidance and August 2025 actions, with ongoing data review from manufacturers and plans for further deregulatory steps for future vehicles.
Iran’s Defence Council warned that any attack on its southern coasts or islands would trigger Gulf-wide mining and closure of all routes, effectively turning the Strait of Hormuz into a mined corridor for an extended period; Tehran reminded that non-belligerent ships can pass only with Iran’s coordination, as the U.S. weighs pressure options around Kharg Island amid escalating tensions.
The EPA is considering eliminating limp-mode/derate restrictions triggered by low Diesel Exhaust Fluid in diesel trucks and is requesting data from the top manufacturers to assess warranty claims, failure rates, and repairs for certain model years, with a 30-day deadline. This follows a broader shift toward deregulation under Administrator Lee Zeldin, who previously extended the window before derates took full effect. If derates may no longer be required for compliance, diesel pickups could run at higher performance without frequent DEF refills.
The Pentagon’s National Defense Strategy envisions a more limited U.S. deterrence role toward North Korea, shifting primary responsibility to South Korea, which hosts about 28,500 U.S. troops. The plan keeps homeland defense as a priority while allowing the U.S. to operate flexibly beyond the peninsula if needed to counter broader threats, including China and potential Taiwan contingencies.
Britain will boost its military reserves by raising the maximum call-up age to 65 and lowering the threshold to include warlike preparations, aiming to improve readiness and align with NATO practices; changes are slated to take effect from spring 2027.
The EPA plans to eliminate 'low DEF' limp mode in trucks starting with 2027 models, arguing that the annoyance of the feature is unnecessary, despite it helping reduce harmful emissions. This move conflicts with existing tamper prevention regulations, raising concerns about drivers bypassing emission controls. While the regulation aims to improve air quality, critics worry it may lead to increased pollution if drivers disable DEF systems.