Description And Operation: Description

Courtesy of CHRYSLER GROUP, LLC

The engine is equipped with four heated oxygen sensors:

• The right upstream oxygen sensor (2) is referred to as the 1/1 sensor.
• The right downstream oxygen sensor (1) is referred to as the 1/2 sensor.
• The left upstream oxygen sensor (4) is referred to as the 2/1 sensor.
• The left downstream oxygen sensor (3) is referred to as the 2/2 sensor.