We appreciate your visit to OBD II equipped vehicles periodically run a test of the EVAP system while underway to make sure that A There are no leaks in the. This page offers clear insights and highlights the essential aspects of the topic. Our goal is to provide a helpful and engaging learning experience. Explore the content and find the answers you need!
Answer :
Final answer:
OBD II-equipped vehicles run an EVAP test to ensure the fuel vapor recovery system is functioning correctly. This system helps the car meet emission standards and aids in fuel economy. Despite the fact that manufacturers are required to submit EPA fuel economy tests, the majority of these are taken at face value and not actually tested by the EPA.
Explanation:
OBD II-equipped vehicles periodically run a test of the EVAP (Evaporative Emission Control System) to make sure that the fuel vapor recovery system is functioning correctly (option D). This is critical because the EVAP system prevents the release of harmful gasoline vapors into the atmosphere, thereby helping the vehicle comply with emission standards. When the EVAP system operates correctly, it recovers and recycles fuel vapors that would otherwise escape from the vehicle's fuel system, thus indirectly aiding in fuel economy.
While manufacturers are required to submit EPA fuel economy test results, only a fraction of these cars are tested by EPA's automobile-testing department. The remainder are taken at face value from the automakers' submissions. This is a testament to the importance of having a properly functioning EVAP system and the integrated OBD II self-check to ensure vehicles are meeting their expected emission standards and fuel economy claims.
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