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Q: i pulled a po107 code map/bar lowinput....ialreadyc allo2 sensor last year its w on 2000 Cadillac DeVille

here are the other codespo171bnk1 po174bnk2
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wnt too auto zone maf sensor is bad because when all 5 codes pointed too 02 sensors mass air flow sensor is bad it never been change on vehicle it has 186-786.5 miles on engine... is the maf in side of the breather where the throttle body mates up with the air filter remember im the novice here.....lol!!!!!
i checked that too found no leakes . still baffel going too pull them tomorrow and really trace them down it really puzzeling because i took everything apart check and recheck...... same codes pop back up....
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