In order to obtain more power from the engine cylinders, the forced induction of one of the cylinders is used. By forcing more air into the cylinder, more oxygen is obtained in combustion, which is why the ECM (Engine Control Module) injects more fuel and this results in more power. Forced induction to an engine generates over 40% more power than a naturally aspirated engine with the same displacement.
Forced induction motors have two IAT (Intake Air Temperature Sensor) sensors. Because the air temperature increases under pressure, IAT Sensor 2 measures the air temperature just after the turbocharger. If a problem is detected with this sensor, which could be a temperature or voltage out of range, the Check Engine light is illuminated and the DTC code P0098 OBDII is stored.