Where is the Intake Air Pressure and Temperature Sensor Located?
2 Answers
The intake air pressure and temperature sensor is located on the intake pipe or the intake manifold. The principle of the intake air pressure and temperature sensor is: it is a negative temperature coefficient thermistor. When the temperature rises, the resistance decreases, and when the temperature drops, the resistance increases. As the resistance in the circuit changes, the voltage changes accordingly, generating different voltage signals to complete the automatic operation of the control system. Symptoms of a faulty intake air pressure and temperature sensor include: 1. The engine warning light stays on when the ignition is in the ON position; 2. A small amount of black smoke is emitted when gently pressing the accelerator while stationary, and a large amount of black smoke when accelerating sharply; 3. The engine lacks power; 4. Fault code P01D6.
After years of driving, I finally realized that the intake air pressure temperature sensor is mainly fixed on the engine's intake manifold—that's the pipe connecting from the air filter all the way to the engine block. A common location is near the throttle area of the manifold. For example, in Toyota Corolla models, you can find it on the left side as soon as you lift the hood. Some Volkswagen or Ford models might have it installed on the side. Why there? Because it measures the pressure and temperature of incoming air in real-time, sending data to the ECU to adjust fuel injection for more efficient combustion. If the sensor fails, the car might idle roughly, lack power during acceleration, or experience a sudden spike in fuel consumption. I recommend new car owners start with simple checks: open the hood and look for a small square component with cables on the manifold; keeping it clean can prevent dirt from affecting performance. Remember, regular checks can reduce repair costs—don’t wait for the warning light to come on.
