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#1
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o2 sensor
What does bank 1 and bank 2 mean when using a scanner for the check engine light. it says something about the o2 sensor bank 1
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#2
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Re: o2 sensor
... bank 1 is the one in the exhaust madifold, bank 2 is the down stream by the CAT.
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1999 Grand Am SS 3.4 OHV
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