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1994 GMC Sonoma Question: code 41 and a code 54

 

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brendenwilson, 2.2L 4 Cylinder, Harrison, TN, April 17, 2013, 12:30
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I have replaced the crank sensor in hopes that's what this was but it didn't solve anything the engine runs smooth but is gutless i cant get it above thirty and its drinking a lot of gas and the cat converter glows red after running for awhile it idles smooth just hesitant when climbing rpms what should i replace next with these two codes showing?

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