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I have a Chevy 2002 express cargo van and the code indicated that the O2 sensor Bank2 sensor 1 is not working. Which one is this I see three sensors on the exhaust

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The BANK 2 on your chevy is the PASSANGER SIDE.
And BANK 1 is at the DRIVER SIDE.
The sensor 1 is the UP sensor. It's mean BEFORE catalystic.
And the sensor 2 IS AFTER Catalystic.

OK... I hope this help on your question
Thank you for use fixya.

Posted on Jul 25, 2008


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My check engine light comes on . it read that my oxygen senseor or is it my cat-convertor?.is it regular problem with these chevy cargo van 2004 express

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I ran a Diagnostic on my 1998 chevy venture mini van and here are the codes that came up, P0102, P0134. What does this mean? I have already replaced the following, fuel pressure regulator, both crankshaft...

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I do not believe that it is a problem with a valve/head gasket or cam.

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