When using mass air flow sensor cleaner, it is important to only spray it directly onto the mass air flow sensor itself. The mass air flow sensor is a delicate component and spraying it on other parts of the vehicle can cause damage.

In a 2015 Ford, the mass air flow sensor is typically located between the air filter box and the engine intake manifold. It measures the amount of air entering the engine and provides this information to the engine control unit for proper fuel injection and air-to-fuel ratio calculation.

To clean the mass air flow sensor, you should first disconnect the electrical connector from the sensor. Carefully remove the sensor from its housing, being cautious not to damage any of the delicate wires or components. Once removed, you can use the mass air flow sensor cleaner to spray directly onto the sensor.

It is important to follow the instructions on the cleaner product carefully, as different brands may have specific instructions. Typically, you should spray the cleaner onto both sides of the sensor, allowing the cleaner to penetrate and loosen any dirt or debris.

After spraying, you can use a soft brush or cloth to gently wipe away any remaining dirt or residue. Be extremely gentle when cleaning the sensor, as applying too much pressure can damage the fragile wires.

Once the sensor is clean, you can reassemble it back into its housing, ensuring a proper connection to the electrical connector. Make sure that everything is secured and tightened correctly before starting the engine.

Always refer to your vehicle's specific manual or recommended procedures for cleaning the mass air flow sensor, as different car models may have slightly different procedures.