General Description

Heated Oxygen Sensor 1 (HO2S 1):

The fuel control heated oxygen sensor 1 (HO2S 1) is mounted in the exhaust pipe below the exhaust manifold. The main function of the fuel control heated oxygen sensor is to provide the Powertrain Control Module (PCM) with exhaust stream oxygen content information. The exhaust stream oxygen content information enables the PCM to provide the proper fueling and achieve vehicle emissions that are within the mandated levels.