They are all threaded into the exhaust system at various points. You will find one after each bank of cylinders before the catalytic converter and one after the catalytic converter for a total of three.
There are approximately 2 oxygen sensors on a 2005 Chevrolet Astro van. The oxygen sensors can be purchased at stores such as NAPA.
The oxygen sensors are screwed into the exhaust on the rear of the engine.
where is the oxygen sensor in a 2004 astro van
yes one before the cat.
Four cylinder engine? 2 sensors, one before the cat and one after.
Where is bank 1 on a 2002 chevy astro van
The Astro was discontinued in 2005, so I'm not sure what a 2009 Astro would be.
1 one before and one after the convertor On my 99 there is one on each pipe coming off of the manifold and one after the converter for a total of 3.
If the 8th digit on your vin number is an X as mine is there are 3 oxygen sensors. I don't have dual exhaust so I have one o2 sensor below each manifold (visible from underneath the van) and one after the catalytic converter.
A 2003 Chrysler van has two oxygen sensors in the exhaust pipe on the rear of the engine.
Two
Two.Two.