P101 P102 and P0171 All at the Same Time? - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
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post #1 of 4 (permalink) Old 04-17-2017, 06:42 AM Thread Starter
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P101 P102 and P0171 All at the Same Time?

I have been using the air conditioner lately and it seems to be exacerbating an existing problem. Sometimes the motor hesitates/ bucks on acceleration but most of the time it isn't really noticeable, and the pcm is showing codes 101, 102, and 171. Have any of you had this same thing happen with these same codes? It is basically indicating low mass air output and it is running lean in bank 1.
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post #2 of 4 (permalink) Old 04-17-2017, 09:22 AM
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Those codes will come up when either your intake air filter is real dirty or if your MAF is dirty. Rarely does a MAF sensor fail complete but they can and this might also give you these codes and more.

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post #3 of 4 (permalink) Old 04-17-2017, 10:26 AM Thread Starter
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Ok thanks the air filter is pretty new, I have mass air cleaner so I'll look at the sensor and spray it.
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post #4 of 4 (permalink) Old 06-27-2017, 07:48 PM
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Did that fix the jerking on acceleration? I have the same problem.
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