O2 sensor

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AP01ARB3AR

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Oct 12, 2011
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On my way up here to Alaska my kj threw a code for O2 sensor 1 in bank one? Does anyone know if this is the one before or after the cat?
 

Daveos

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The 1/1 sensor sensor is the drivers side before the cat. 1/1, 1/2 drivers side. 2/1 2/2 passengers side.
 
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