Engine Controls - Theory & Operation: Introduction
WARNING:
On Prius, read service precautions before proceeding with service procedure. See SERVICE PRECAUTIONS .
NOTE:
References to California models apply to California emission vehicles, which may be verified by underhood Emission Control label. California emissions may be available in other states.
This article covers basic description and operation of engine performance-related systems and components. Read this article before diagnosing vehicles or systems with which you are not completely familiar.