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  #1  
Old 01-28-2015, 07:39 PM
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Question Code po139 ,o2 slow response

THATS MY CODE PO139 SAYS SLOW RESPONCE. I CHANGED ALL 4 SENSORS
.gas cap ,cleaned Intake,20" vacuum ,seafoam in gas tank , no leaks in intake or exhaust ,.CLEARED CODE AND COMES BACK EVERYTIME..MOSTLY EVERYTIME I TAKE MY FOOT OFF GAS FAST WHEN IM GOING 30-70 MPH
...ANY SUGGESTIONS ????????

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  #2  
Old 01-28-2015, 09:42 PM
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Re: Code po139 ,o2 slow response

What brand O2 sensor? Someone said to stick with factory originals and avoid Bosch as they are slower than the others.


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  #3  
Old 01-29-2015, 06:54 PM
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Re: Code po139 ,o2 slow response

Two are bosch & two are walker ..tryed set on top & bottom & then bosch on one side & wagner on other.. Still sets of code.....
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