A Vehicle Comes into the Shop and the Technician Retrieves

question 15

Multiple Choice

A vehicle comes into the shop and the technician retrieves the diagnostic code P0401 "EGR flow insufficient." Which of these could be the cause?

• A) EGR valve stuck open
• B) Electrical wiring shorted
• C) Clogged EGR ports or passages
• D) All of these are correct.

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Definitions:

Superfund Sites

Locations in the United States identified by the Environmental Protection Agency as contaminated by hazardous materials and eligible for federal cleanup funds.

Clean Up

The process of removing pollutants or contaminants from an environment, often referring to industrial or hazardous waste remediation efforts.

Clean Air Act

A comprehensive federal law in the United States that regulates air emissions from stationary and mobile sources to protect public health and the environment.

Air Pollution

The presence of substances in the atmosphere that are harmful to the health of humans and other living beings or cause damage to the climate or materials.