DeVille V8-4.6L VIN Y (1998)
Oxygen Sensor: Description and Operation
Description
DESCRIPTION
Four oxygen sensors are mounted in the exhaust system where they monitor the oxygen content in the exhaust stream. There is an oxygen sensor
mounted in each exhaust manifold. The exhaust manifold are bolted on to the cylinder head, and one on each end of the catalytic converter (later
production vehicles will only have the post catalyst sensor). The oxygen sensor located in the front exhaust manifold is the Bank 2 Sensor 1 (Front)
sensor. The oxygen sensor located in the rear exhaust manifold is the Bank 1 Sensor 1 (Rear) sensor. The oxygen sensor located in the Y-pipe ahead of
the catalytic converter is the Bank 1 Sensor 2 (Pre-converter) sensor. The oxygen sensor located in the catalytic converter outlet is the Bank 1 Sensor 3
(Post-converter) sensor.
CONSTRUCTION
