Tampering with emissions systems on road-registered vehicles violates federal law. EPA actions have led to fines reaching $4,500 per vehicle for individuals, with significantly higher totals for companies.
How Enforcement Works
- 🔎 Inspections & Audits: Triggered by complaints, visible smoke, or program audits.
- 🧪 Testing: Emissions inspections or OBD checks may detect tampering.
- ⚖️ Penalties: Civil fines, consent decrees, and obligations to restore vehicles to compliant condition.
Risk Reduction: Off-Road & Export
Operators avoid legal exposure by restricting deletes to:
- 🚜 Off-road construction & industrial equipment on private land
- 🌾 Agricultural machinery operating on private property
- 🌍 Export-only machines shipped outside the USA
See the national context: Laws for DEF Delete in the USA
Why Deletes Continue Despite Penalties
- ✅ Prevents costly downtime from SCR/DEF failures
- ✅ Cuts recurring spend on DEF and NOx sensors
- ✅ Keeps work moving during critical project timelines
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