Nobody seems to know why my check engine light stays on all the time.

If your dealer can't help, find a new dealer! This is not that complex. Or, try a different repair facility near you. The codes will help a technician troubleshoot what is failing. P0068 states there is an issue with throttle body air flow performance. P1101 indicates an issue with mass air flow performance. P0102 stands for mass air flow circuit low voltage. When the MAF sensor was replaced, was the engine's processor reset? You may need to disconnect the battery for maybe 15 minutes to ensure old data is cleared from the engine's computer. If the codes return again, continue troubleshooting within that circuit and wiring, likely to show a concern.