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Why do I get a "MAF sensor out of self test range" after replacing with an OEM Delco part?

RKBrownRKBrown Member Posts: 1
edited April 2019 in Chevrolet
Replaced the sensor at about 77000 miles last week, in Tennessee. Fuel use dropped 25%, but 500 miles later, I have a code repeatedly set that MAF sensor is out of self test range.

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    Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    Could be the MAF but you should also check for vacuum leaks, a cracked air intake plenum or even a bad EGR valve that is stuck OPEN. I presume this is the P0101 code?
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