Question about 1996 Toyota Camry

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Catalytic converters diagnostic code on check engine light says problem in bank 1 of catalytic system My 96 toyota camry 2.2 l, 4 cylinder has 2 converters. front and back. y car has 260,000 miles on it. Do I need to replace both converters or just front or just rear? Thanks, Mike

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If you are going to change the convertors I would just replace the first one closest to the engine. But when a computer code says "bank" they usually are refuring to the Oxygen sensor that is there , they are classified as bank 1 and bank 2. 1 being closest to the engine and 2 being farther down the exhaust. If its a computer code that told you bank 1 you might need to look at your oxygen sensor instead of your catalitic converter.

Posted on Dec 12, 2008

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Bank 1 is always the same side as the number one cylinder. Bank 2 is the other side of the engine. Sensor 1 is always before the catalytic converter and Sensor 2 is always after the catalytic converter.

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So , for example, if your looking for Bank1 Sensor2 it will be in the exhaust pipe after the cat on the same side as the number one cylinder.

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Hi, I need to take my 2001 Mazda 626 4cyln for SMOG check in CA. But its check engine light is on, diagnosed as code P0421. Appreciate your help to fix this problem, or just to pass the check. Thank you.


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replace O2 sensors, or your Catalytic Converter.

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1 Answer

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Bank 1 is on the same side as Cylinder 1
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1 Answer

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