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Hello, All I am dealing with a P0101 on a 2015 Nissan Sentra. The MAF g/s is erratic. I have installed a new one that I purchased on Ebay, and the signal is still erratic. The car has slow acceleration. I could notice that the Short term fuel trim was taking away fuel due to Alpha being 98. I was trying to use a vacuum gauge to rule out restricted cat, but could not remove a vacuum line. will do tomorrow. Any suggestions on how to proceed?