The 1999 has three O2 sensors. One in each of the exhaust pipes coming off of the manifold and a third after the catalytic converter. Not sure if the 96 is the same or not.
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Astro Plan ended in 2010-02.
The 1997 Chevrolet Astro Van 02 sensor can be found attached to the outside of the air cleaner housing. The O2 sensor will be on the back side of the air cleaner housing.
There are a total of 4 O2 sensors 1 on the left AND right exhaust manifold 1 before the catalytic converter and 1 after it.
Most oxygen sensors are heated oxygen sensors.
The 02 sensors are in the exhaust pipes but don't know about the updraft sensors.
Leeza - 1994 1996-02-02 was released on: USA: 2 February 1996
There are 2 upstream 02 sensors just behind the exhaust manifolds, threaded into the exhaust pipes, one on each side. There are 2 downstream 02 sensors just behind the catalytic converters, one on each side as well.
The vehicles computer relies on the information from the 02 sensors and other sensors to adjust the engine for peak performance.
The o2 sensors screw in. There is a special socket for removing the 02 sensors with a slot in the side to clear the wiring.
all O2 sensors are threaded into the exhaust at various points.
it has three 02 sencers