Can't clear or diagnose P2141 and P0102

Question

I get these two codes. Cleaned the MAF sensor (filthy). Can't delete codes with scanner. Truck runs OK, no smoke, good acceleration, but mileage seems a little off - usually about 19-22 mpg, now down to about 17, although not a good test. Truck seems to have been getting poor mileage for awhile - even prior to codes showing up. Cleaned EGR valve. Did the required EGR and EGR cooler clean at recommended miles. No codes then.

EGR is stock - truck has about 90,000 miles.

Not sure how to test the MAF sensor - may just replace.

Answer 1

More than likely you have to replace the MAF. Low gas mileage and code P0102 are good indication that the MAF it's not working properly.