CCJ

DEF sensor delete 'not simple' but a 'common‑sense path forward'

The U.S. Environmental Protection Agency (EPA) last week issued guidance that drops the requirement for Diesel Exhaust Fluid (DEF) sensors as part of a truck's aftertreatment system and allows truck ...
CCJ

EPA strikes DEF sensor requirement, seeks to end derates over fluid quality

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 ...
来自MSN

EPA urges diesel makers to drop failure-prone DEF quality sensors

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 ...
来自MSN

EPA drops DEF sensor requirement after Trump push, reports say

The Environmental Protection Agency announced on March 27, 2026, that it is removing the diesel exhaust fluid sensor requirement for all diesel equipment, a decision the agency frames as a direct ...
Transport Topics

EPA Moves to Address DEF System Failures

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 ...