Recently the Environmental Protection Agency (EPA) announced that diesel exhaust fluid (DEF) quality sensors are not required on trucks. The American Trucking Associations (ATA) and others have argued ...
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 ...
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 ...
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Diesel owners see big DEF rule change
The EPA has rolled back its requirement for diesel exhaust fluid (DEF) quality sensors, allowing NOx sensors to be used instead. This move aims to reduce costly breakdowns and downtime for truckers, ...
The EPA is targeting faulty DEF sensors with new guidance allowing a different type of sensor to monitor NOx emissions in diesel engines. In the Trump administration’s latest steps to address the ...
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