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To locate the Idle Air Control Valve on a 2002 Nissan Altima, you can refer to the YouTube video mentioned in this link: https://www.Youtube.com/watch?v=k4H80oy4o-E. There are several potential issues that may arise with the engine: a spark plug could detach, leading to engine problems; a loose gasket should be tightened; oil leaks should be promptly fixed; engine overheating is a serious concern that can result in fires and even explosions. It's important to monitor oil usage and replace it sooner than usual if needed. Coolant should be replaced roughly every 60,000 miles, while the air filter should be changed every 15,000 to 30,000 miles. As for spark plugs, they typically should be changed every 100,000 miles, unless using a copper spark plug, which needs to be replaced every 30,000 miles.
The location for the idle air control valve on a 2002 Nissan Altima is close to the throttle body in the intake manifold.