Catalyst & Oxygen Sensor Configurations

The heart of any emissions system is the catalytic converter and it's accompanying oxygen sensor(s). The following articles will discuss how these components function in an OBD II system. As you can see, there have been some major changes to our 1996 exhaust system configurations.

All V6 models use a pair of catalysts merging into a single outlet pipe. Double wall pipe is used all the way back to the catalysts to help the catalysts reach operating temperature as quickly as possible. This configuration requires the use of two post-catalyst oxygen sensors with heavily-armored sheathing to protect the wiring as it passes under the car.

With their simpler, single-pipe system, four cylinder models need just one pre- & post-catalyst sensor.