My check engine light recently came on. I have a 2002 Tahoe, with about 116,000 miles on it. The only aftermarket on the truck is a K&N intake and a Gibson exhaust. When I hooked up a code reader, the codes were P0101, P0102, P0174, and P0175. I changed out the MAF sensor, then changed out the Intake gaskets. This seemed to have cleared most of the codes, all but P0102 MAV low voltage lean mixture. Can anyone help me to figure how to fix this. I have tried to clear the codes already, and it just comes back. I also cleaned the injectors, the intake manifold, and throttle body. Thank you in advance to anyone who can help....