If ECS components have been tampered with, what is the vehicle's likely emissions status?

• A. The vehicle will automatically become a gross polluter.
• B. The inspection will be ignored.
• C. The vehicle will pass the inspection after a minor adjustment.
• D. The vehicle will require no further action.

Answer: (A)

Tampering with emissions control components disables the devices that reduce pollutants, so the test program treats the vehicle as a gross polluter. That means the vehicle fails the inspection and must be repaired and re-tested before it can pass. It’s not a minor adjustment, nor is it ignored or require no action. Examples of tampering include removing or bypassing the catalytic converter, disabling the oxygen sensors, or altering the ECU to defeat emissions controls.