O2 Sensor: Description

WARNING: This page is about a different car, the 2006 Dodge Viper. However, it is still accessible from the selected car via links, so may be relevant.

The upstream O2 sensors are in the exhaust system in the exhaust manifold collector area before the upstream catalytic convertor. See Fig 1.

Fig 1: 2/1, 2/2, O2 SENSORS

Courtesy of DAIMLERCHRYSLER CORP.

1 - Upstream O2 Sensor

2 - Downstream O2 Sensor

The downstream O2 sensors are in the exhaust system in between the catalytic convertors. See Fig 1.