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Newb here so excuse my ignorance. My 2005 Wrangler keeps giving me a CEL and my code reader says 'bank 1, sensor one' is throwing it. It tells me that the sensor is slow to respond. Which sensor do I need to change? Thanks in advance.
 

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You have four O2 sensors. The header comes off the block in two sets of three primaries. Bank one is the forward set of three. Sensor one is the first one on the top of the mini cat.
 
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