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97 chevy 5.7. I have 3 code that the reader picked up. P0141 P0300 P1133

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97 chevy 5.7. I have 3 code that the reader picked up. P0141 P0300 P1133

  #1  
Old 03-21-2017, 02:05 PM
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Default 97 chevy 5.7. I have 3 code that the reader picked up. P0141 P0300 P1133

Can someone tell me why both o2 sensors would go at the same time?
 
  #2  
Old 03-29-2017, 11:59 AM
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I'd be willing to bet you have a vacuum leak that is triggering both 02 sensors. with the truck running spray brake cleaner near all your vacuum hoses.

I had a P0141 on my truck two weeks ago and then realized that my dumb *** forgot to tighten down the clamp on the intake right after the MAF...
 
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