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Where is the mass air flow sensor located on a 2000 Cadillac Catera?

The mass air flow sensor on a 2000 Cadillac Catera is located in the air intake tube, just before the throttle body. It is a small, cylindrical device with a wire mesh screen inside. The wire mesh screen is heated, and as air flows through the intake tube, it cools the screen. The amount of cooling is measured by the sensor, and this information is used to calculate the mass of air flowing into the engine.