Oxygen Sensor: Locations

The Oxygen Sensors (O2S) are attached to, and protrude into the vehicle exhaust system.

The vehicle uses a total of 4 sensors; 2 upstream (referred to as 1/1 and 2/1) and 2 downstream (referred to as 1/2 and 2/2).

The right upstream sensor (1/1) is located in the right exhaust pipe just before the mini-catalytic converter.

The left upstream sensor (2/1) is located in the left exhaust pipe just before the mini-catalytic converter.

The right downstream sensor (1/2) is located in the right exhaust downpipe just after the mini-catalytic converter, and before the main catalytic converter.

The left downstream sensor (2/2) is located in the left exhaust downpipe just after the mini-catalytic converter, and before the main catalytic converter.