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What is Tampering?
Tampering with a vehicles emissions control system is prohibited
by the Clean Air Act of 1990 (40 CFR Title 2, Part A, Section 203).Emissions
controls on vehicles are part of the certified design from the manufacturer
to reduce pollution and protect public health.
Tampering could include the removal, bypass, disconnection, damage
or in any way rendering ineffective any emissions control device
or element of design that has been installed on a vehicle or engine.
In summary, this means:
- Removing any parts or devices, such as the catalytic converter,
oxygen sensor, EGR valve, etc., that will alter the original emissions
control equipment configurations on a vehicle
- Disconnecting vacuum lines and electrical or mechanical parts
of the emissions control system, such as electrical solenoids,
sensors, or vacuum activated valves.
- Adjusting any element of a vehicle’s emissions control
design so that it no longer meets the manufacturer’s specifications.
- Installing a replacement part that is not the same in design
and function as the part that was originally on the vehicle, such
as an incorrect exhaust part.
- Adding a part that was not originally certified on the vehicle
(e.g., installing a turbocharger.)
If you have any other questions, please visit the Customer Service
Representative at any of the vehicle emissions testing stations,
or call the Illinois EPA at (800) 635-2380, or check
this website for updates.
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