Bank 1, Bank 2, whats what? - Chevrolet Forum - Chevy Enthusiasts Forums

Bank 1, Bank 2, whats what?


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Join Date: Apr 2008
Posts: 11

April 19th, 2008, 7:44 PM   #1  
Bank 1, Bank 2, whats what?

So its looks like i'm going to be replacing one of my cats. my ses light says my bank 2 o2 sensors reading too lean and my bank 2 cat isnt ruunning effciently. i'm assuming this is the bad cat. (i think thats a pretty safe assumtion) so what side is bank 2?
Thanks!!

 
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April 19th, 2008, 9:20 PM   #2  
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RE: Bank 1, Bank 2, whats what?

Not sure but I would try replacing the O2 on your cat first and see what happens.

 
Join Date: Jan 2007
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April 19th, 2008, 10:22 PM   #3  
RE: Bank 1, Bank 2, whats what?

Bank one is the driver's side. Bank 2 is the passenger's side. Sensor one in each bank is before the cat. Sensor two is behind it.

 
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April 19th, 2008, 10:52 PM   #4  
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RE: Bank 1, Bank 2, whats what?

As ehhget said, a bad O2 can fool the computer into thikning the cat is bad, try the sensor first then do that cat if the problem persists

 
Join Date: Jan 2007
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April 20th, 2008, 9:15 AM   #5  
RE: Bank 1, Bank 2, whats what?

Don't just throw parts at it.Parts like cats and O2 sensorsare expensive. A dealer (or other mechanic) with a scantool can check your O2 sensors to accurately diagnose the problem.

If you do need to buy cats, you can find them on eBay for about $52 each with free shipping.

 
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April 20th, 2008, 11:01 PM   #6  
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RE: Bank 1, Bank 2, whats what?

Yeah like Ron said probably best to have it diagnosed first instead of doing a crap shoot will save some cash and frustration in the long run.

 
Join Date: Apr 2008
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April 21st, 2008, 7:40 AM   #7  
RE: Bank 1, Bank 2, whats what?

thanks for the good info all. i believe that my cat is bad because of the loud buzzing noise coming from my exhaust when i'm on the gas. it sounds like a baffold broke lose and is buzzing back and forth or somthing. is that possible??

 
Join Date: Feb 2008
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April 21st, 2008, 2:05 PM   #8  
RE: Bank 1, Bank 2, whats what?

That buzzing noise could possibly be coming from the muffler too, or are you positive it is the cat?

 
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April 21st, 2008, 3:23 PM   #9  
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RE: Bank 1, Bank 2, whats what?

Give the cat a smack with your fist, if it rattles then the insides are shot

 
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April 21st, 2008, 11:02 PM   #10  
Senior Member
RE: Bank 1, Bank 2, whats what?

Be careful with the smack test on the cat though. I did that once and thought it was bad only to learn it was a bunch of tiny rocks vibrating on the heat shield.

 
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