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

Evan Williams is an automotive journalist and mechanical engineering technologist with more than a decade of experience in the industry. He has written for the Toronto Star and AutoTrader Canada and ...

Which diesel exhaust fluid is best? When you have a diesel vehicle, besides adding fuel, you need to add diesel exhaust fluid. Diesel-powered vehicles require diesel exhaust fluid to reduce engine ...

The U.S. Environmental Protection Agency on Friday said it is dropping the requirement for diesel exhaust fluid (DEF) sensors as part of a truck's aftertreatment system in favor of monitoring actual ...

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 ...

Diesel exhaust fluid is essential for keeping your engine functioning without letting off too many emissions. But it doesn't ...

The White House came alive today with the Great American Agriculture Celebration, but the real fireworks happened when President Trump announced a massive regulatory shift that is set to change the ...

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 ...

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

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

EPA’s repeal of the endangerment finding could be the largest deregulation in history, and it will have a huge impact on agriculture and the biofuels industry. If the agency no longer determines ...

President Donald Trump on Friday announced the Environmental Protection Agency was removing the DEF sensor requirement for all diesel equipment used by farmers, truckers, and bus drivers. At the same ...