The Environmental Protection Agency announced on March 27, 2026, that it is removing the diesel exhaust fluid sensor ...

Selective catalyst reduction (SCR) systems were introduced in 2010 in the United States to meet the NOx requirements. With an SCR system, DEF is injected into the exhaust stream, and this enables the ...

Farmers gain relief as EPA eliminates DEF sensor rules, cutting costs and reducing equipment failures during critical ...

The EPA is encouraging manufacturers to return to or adopt NOx sensor-based strategies to improve system robustness and reduce failures associated with DEF sensors, but OEMs are largely left to ...

If a truck driver wants to save a few bucks by running some of its miles without diesel exhaust fluid (DEF), it’s now going ...

Diesel owners who have wrestled with warning lights, sudden power loss or even complete shutdowns tied to diesel exhaust ...

Added information on DEF / DPF system history for on-road and off-road diesel-powered vehicles and equipment. The run of ...

New guidance allows engine makers to replace problematic DEF sensors with NOx-based systems, aiming to reduce unnecessary derates and downtime caused by failures in the sensors designed to ...

Diesel engines across agriculture, trucking and construction have been sidelined by a tiny part that was supposed to keep the air cleaner. After years of complaints about failure-prone diesel exhaust ...

Sick of DEF failures shutting you down? EPA is pushing changes that could reduce disruptions caused by faulty sensors.

[Stay on top of transportation news: Get TTNews in your inbox.] Ongoing shortages of replacement parts for failed diesel exhaust fluid quality sensors are believed to be causing thousands of trucks ...

EPA approved guidance allowing diesel manufacturers to replace urea quality sensors with NOx sensors in DEF systems. The agency said faulty DEF sensors are a significant source of warranty claims and ...