Where is the air sensor on a ford f150 4.2 engine?

The air sensor on a Ford F-150 with a 4.2-liter engine is typically the Mass Air Flow (MAF) sensor, located in the air intake duct, just after the air filter and before the throttle body. It measures the amount of air entering the engine to help optimize fuel delivery. To access it, you'll need to remove the air intake hose connected to the throttle body. Always ensure the engine is off and cooled down before working on it.