1. A fault identification system for intake system sensors, comprising: a throttle position sensor (TPS); a manifold absolute pressure (MAP) sensor; a mass airflow (MAF) sensor; and a diagnostic controller that is coupled to said TPS, said MAP sensor and said MAF sensor, that implements a throttle model, a first intake model and a second intake model, and that identifies a fault in one of said TPS, said MAP sensor and said MAF sensor.