Manifold Air Temperature (MAT) Sensor

On some models, MAT sensor may also be referred to as a Intake Air Temperature (IAT) sensor. If a MAT sensor related code is present, see appropriate G - TESTS W/ CODES article.

An out-of-calibration sensor may not set a trouble code. Use following procedure to test calibration. Disconnect MAT sensor harness connector. Connect ohmmeter between sensor terminals. Sensor resistance should be as specified. See MAT SENSOR RESISTANCE table. With vehicle sitting overnight, MAT sensor and coolant sensor should have close to the same resistance reading.