EPA Pushes Replacements for Faulty Urea Sensors in Diesel SCR Systems
TL;DR Summary
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.
- EPA Tells Diesel Engine Makers to Ditch One of the Most Unreliable Emissions Components The Drive
- The DEF Rules Changed This Week. Here Is What the Guidance Actually Says — and What It Does Not. FreightWaves
- DEF sensors dropped: What to know about EPA’s $14B decision michiganfarmnews.com
- EPA Eases DEF Sensor Rules, But Keeps DEF Emission Requirements in Place DTN Progressive Farmer
- EPA administrator visits Rocky Mount to discuss diesel engine regulations WITN
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